這裡將詳細地對例示性實施例進行說明，其實例表示在附圖中。下面的描述涉及附圖時，除非另有表示，不同附圖中的相同數字表示相同或相似的要素。以下例示性實施例中所描述的實施方式並不代表與本說明書一個或多個實施例相一致的所有實施方式。相反，它們僅是與如所附申請專利範圍中所詳述的、本說明書一個或多個實施例的一些態樣相一致的裝置和方法的例子。
需要說明的是：在其他實施例中並不一定按照本說明書示出和描述的順序來執行相應方法的步驟。在一些其他實施例中，其方法所包括的步驟可以比本說明書所描述的更多或更少。此外，本說明書中所描述的單個步驟，在其他實施例中可能被分解為多個步驟進行描述；而本說明書中所描述的多個步驟，在其他實施例中也可能被合併為單個步驟進行描述。
圖1是一例示性實施例提供的一種投影螢幕系統的架構示意圖。如圖1所示，該系統可以包括伺服器11、網路12、使用者設備13、投影螢幕終端14和顯示裝置15。
伺服器11可以為包含一獨立主機的實體伺服器，或者該伺服器11可以為主機集群承載的虛擬伺服器。在運行過程中，伺服器11可以運行某一應用的伺服器側的程式，以實現該應用的相關業務功能，比如當該伺服器11運行移動化團體辦公平台的程式時，可以實現為該移動化團體辦公平台的伺服端。
在本實施例中，移動化團體辦公平台不僅可以實現通訊功能，還可以作為諸多其他功能的集成化功能平台，比如對於審批事件（如請假、辦公物品申領、財務等審批事件）、考勤事件、任務事件、日誌事件、投影螢幕事件等團體事件的處理，本說明書一個或多個實施例並不對此進行限制。較為具體地，移動化團體辦公平台可以承載於相關技術中的即時通訊應用，比如企業即時通訊（Enterprise Instant Messaging，EIM）應用。當然，即時通訊功能僅為移動化團體辦公平台支援的通訊功能之一，該移動化團體辦公平台還能夠實現更多諸如上述的其他功能，此處不再贅述。
網路12可以包括多種類型的有線或無線網路。在一實施例中，該網路12可以包括公共交換電話網路（Public Switched Telephone Network，PSTN）和網際網路。使用者設備13可以透過網路12與伺服器11實現互動，投影螢幕終端14可以透過網路12與伺服器11實現互動，以及使用者設備13可以透過網路12與投影螢幕終端14實現互動。
使用者設備13可以包括諸如下述類型的電子設備：平板設備、筆記型電腦、掌上型電腦（PDAs，Personal Digital Assistants）、可穿戴設備（如智慧眼鏡、智慧手錶等）等，本說明書一個或多個實施例並不對此進行限制。在運行過程中，使用者設備13可以運行某一應用的用戶端側的程式，以實現該應用的相關業務功能，比如當該電子設備運行移動化團體辦公平台的程式時，可以實現為該移動化團體辦公平台的用戶端。
投影螢幕終端14可以為具有獨立網路管理能力的無線存取點（Access Point，AP），或者該網路設備11可以包括無線存取點與針對該無線存取點進行管理控制的無線控制器（Wireless Access Point Controller，AC），本說明書並不對此進行限制。在運行過程中，投影螢幕終端14可以維護一區域網路，使得使用者設備13可以基於該區域網路與投影螢幕終端14建立連接，以實現投影螢幕功能。或者，在運行過程中，投影螢幕終端14與使用者設備13可以同時存取網路12，該網路12可以為公用網路（如網際網路），使得使用者設備13可以基於該網路12與投影螢幕終端14建立連接，以實現投影螢幕功能。其中，投影螢幕終端14還與顯示裝置15建立連接，該連接可以包括有線連接或者無線連接，比如可以基於藍牙協定或WIFI協定實現該無線連接，使得投影螢幕終端14可以將來自使用者設備13的投影螢幕內容傳輸至顯示裝置15，以由顯示裝置15進行顯示。
顯示裝置15可以包括投影儀、會議平板、電視機等，本說明書並不對此進行限制。在諸如授課、會議等場景下，顯示裝置15的螢幕尺寸通常大於使用者設備13的螢幕尺寸，以便於多個使用者或較遠處的使用者對顯示裝置15的顯示內容進行查看；但在一些場景下，顯示裝置15也可以包括其他參與者使用的手機、筆記型電腦等使用者設備，這些參與者可以直接在各自的使用者設備上觀看投影螢幕內容。
圖2是一例示性實施例提供的一種伺服器側的投影螢幕方法的流程圖。如圖2所示，該方法應用於伺服器（例如圖1所示的伺服器11），可以包括以下步驟：
步驟202，伺服器根據使用者設備發起的第一投影螢幕請求，確定所述第一投影螢幕請求所含設備投影螢幕碼對應的投影螢幕終端。
在一實施例中，伺服器上運行有移動化團體辦公平台的伺服端、使用者設備和投影螢幕終端上分別運行有移動化團體辦公平台的用戶端，使得伺服器、使用者設備與投影螢幕終端之間可以基於該移動化團體辦公平台實現資料互動等操作，從而實現本說明書的投影螢幕方案。
在一實施例中，設備投影螢幕碼可由伺服器產生，並預先分配至各個投影螢幕終端；或者，設備投影螢幕碼可由投影螢幕終端按照預設方式在本地產生，並上傳至伺服器。總之，伺服器上記錄有各台投影螢幕終端與設備投影螢幕碼之間一一對應的映射關係，使得伺服器可以基於第一投影螢幕請求所含的設備投影螢幕碼精准且唯一地確定出相應的投影螢幕終端。
在一實施例中，投影螢幕終端具有顯示幕，可以將設備投影螢幕碼顯示於該顯示幕上，使得使用者設備的使用者可以查看到該設備投影螢幕碼，並將該設備投影螢幕碼輸入使用者設備中，以產生上述的第一投影螢幕請求。除了顯示於顯示幕上之外，投影螢幕終端還可以透過其他方式將設備投影螢幕碼告知該使用者，比如語音播報等，本說明書並不對此進行限制。其中，使用者設備可以向使用者顯示一輸入介面，以由使用者輸入裝置投影螢幕碼；或者，使用者設備可以採集使用者的輸入語音，並從該輸入語音中識別出設備投影螢幕碼；或者，使用者設備可以提供其他方式，以使得使用者完成對設備投影螢幕碼的輸入操作。
在一實施例中，使用者設備可以維護一歷史記錄，以用於記載使用者輸入過的所有設備投影螢幕碼。那麼，如果使用者在先前已經輸入過上述設備投影螢幕碼，就無需重新輸入，只需在使用者設備維護的歷史記錄中查找到上述的設備投影螢幕碼，即可據此產生上述的第一投影螢幕請求。
步驟204，所述伺服器在所述使用者設備存在安全風險的情況下，向所述投影螢幕終端推送安全驗證碼，以由所述投影螢幕終端對所述安全驗證碼進行顯示。
在一實施例中，伺服器可以透過預設方式識別使用者設備是否存在安全風險，比如伺服器可以在使用者設備未滿足下述投影螢幕條件中以下至少之一的情況下，判定使用者設備存在安全風險：使用者設備上的已登錄使用者（相當於使用者設備的使用者）與投影螢幕終端歸屬於同一團體（本說明書中的團體可以包括企業、學校、醫院、社團、政府機關等，本說明書並不對此進行限制）；已登錄使用者未處於投影螢幕終端所屬團體的投影螢幕黑名單；所述已登錄使用者處於所述投影螢幕終端所屬團體的投影螢幕白名單；已登錄使用者的請求頻率（第一投影螢幕請求的發送頻率）不大於第一預設頻率；使用者設備使用的網路（如公用網路或其他網路）未處於投影螢幕終端所屬團體的網路黑名單；使用者設備使用的網路處於投影螢幕終端所屬團體的網路白名單等，本說明書並不對此進行限制。對於存在安全風險的使用者設備，伺服器可以進一步透過安全驗證碼來驗證使用者設備的安全性，避免在安全性未知的情況下直接將針對投影螢幕終端的投影螢幕資訊提供至使用者設備，防止不安全的使用者設備基於該投影螢幕資訊隨意透過投影螢幕終端實施投影螢幕。
在一實施例中，透過將安全驗證碼推送至投影螢幕終端進行顯示，使得只有位於投影螢幕終端附近的使用者才能夠查看到安全驗證碼，並發起下述的第二投影螢幕請求，而避免未處於投影螢幕終端附近的非法使用者發起第二投影螢幕請求並獲得針對該投影螢幕終端的投影螢幕資訊。例如，當某一訪客到訪過某一企業後，該訪客可能使用並記錄了該企業內投影螢幕終端的設備投影螢幕碼，那麼在該訪客離開企業後，可以隨時透過設備投影螢幕碼向伺服器發起上述的第一投影螢幕請求，但是由於其無法獲得安全驗證碼而無法獲得針對投影螢幕終端的投影螢幕資訊，使得該訪客無論是有意或無意間操作，均無法針對該投影螢幕終端實施投影螢幕，可以防止其影響企業內員工對投影螢幕終端的正常使用。
在一實施例中，伺服器可以在判定使用者設備存在安全風險的情況下，向使用者設備返回針對投影螢幕終端的區域網路投影螢幕資訊。此時，使用者設備如果加入了投影螢幕終端所處的區域網路或者該投影螢幕終端創建的區域網路，那麼該使用者設備可以利用上述的區域網路投影螢幕資訊實現基於該投影螢幕終端的投影螢幕操作；其中，由於區域網路的覆蓋區域有限，使得使用者設備及其使用者必然位於投影螢幕終端附近，即便發生隨意投影螢幕的情況也可以及時發現和制止，即安全風險處於可控程度。
在一實施例中，伺服器可以在使用者設備不存在安全風險的情況下，向使用者設備返回針對投影螢幕終端的投影螢幕資訊。比如，當使用者設備的已登錄使用者與投影螢幕終端歸屬於同一團體時，可以判定該使用者設備不存在安全風險，使得該使用者設備可以利用返回的投影螢幕資訊實現基於該投影螢幕終端的投影螢幕操作，而無需使該使用者設備連接至投影螢幕終端所處或所創建的區域網路。
步驟206，所述伺服器根據所述使用者設備發起且包含所述安全驗證碼的第二投影螢幕請求，向所述使用者設備返回針對所述投影螢幕終端的投影螢幕資訊。
在一實施例中，由於安全驗證碼被顯示於投影螢幕終端上，使得當使用者設備發起的第二投影螢幕請求包含該安全驗證碼時，表明該使用者設備及其使用者處於投影螢幕終端附近，否則無法獲得該安全驗證碼。因此，可以確定該使用者設備的安全風險消除或降低至可控程度，且即便出現隨意投影螢幕的情況也可以及時發現和制止，故而將投影螢幕資訊返回至該使用者設備，使得該使用者設備可以據此實現投影螢幕。
在一實施例中，伺服器可以向投影螢幕終端推送安全驗證碼對應的有效期，以使投影螢幕終端在該有效期內對安全驗證碼進行顯示，而在有效期過後則終止顯示安全驗證碼；相應地，伺服器可以在有效期過後將上述安全驗證碼設為無效狀態，使得有效期過後收到的包含該安全驗證碼的投影螢幕請求無法被正常回應（即不會返回投影螢幕資訊）。基於上述有效期的管理，可以確保位於投影螢幕終端附近的使用者能夠及時讀取安全驗證碼並據此產生第二投影螢幕請求，同時避免該安全驗證碼被多次使用而增加安全性風險。
在一實施例中，伺服器在收到第一投影螢幕請求後，可以記錄該第一投影螢幕請求的發起方資訊（使用者設備及/或已登錄使用者）；以及，伺服器在收到包含安全驗證碼的第二投影螢幕請求後，可以獲取該第二投影螢幕請求的發起方資訊（使用者設備及/或已登錄使用者），並與第一投影螢幕請求的發起方資訊進行比較：如果一致，則返回投影螢幕資訊，否則不返回。據此，當投影螢幕終端附近的使用者A發起第一投影螢幕請求後，即便同樣位於投影螢幕終端附近的使用者B讀取安全驗證碼並提供至未處於投影螢幕終端附近的使用者C，該使用者C也無法基於該安全驗證碼獲得針對投影螢幕終端的投影螢幕資訊，即此時顯示出的安全驗證碼為使用者A專屬，從而避免了安全驗證碼被盜用的風險。
在一實施例中，伺服器可以統計向同一投影螢幕終端推送安全驗證碼的頻率，以將該頻率限制為不大於第二預設頻率。換言之，當針對某一投影螢幕終端推送安全驗證碼的頻率達到第二預設頻率時，伺服器將中止向該投影螢幕終端推送安全驗證碼，比如進入預設時長的冷卻狀態，以避免針對投影螢幕終端實施網路攻擊、提升安全性。進一步的，伺服器是在接收某一使用者使用的使用者設備發起的第一投影螢幕請求後，導致其頻繁（例如達到第二預設頻率）向上述投影螢幕終端推送安全驗證碼，那麼伺服器還可以提取出該使用者的帳號資訊及/或其使用的使用者設備的資訊（如IP位址、MAC位址等）並加入黑名單，使其無法繼續針對上述投影螢幕終端發起攻擊。
在一實施例中，伺服器回應於使用者設備發起的第二投影螢幕請求，可以向該使用者設備返回針對投影螢幕終端的公用網路投影螢幕資訊，使得使用者設備可以基於該公用網路投影螢幕資訊實現公用網路投影螢幕，那麼使用者設備只需連接至公用網路、無需與投影螢幕終端處於同一區域網路內，即可透過投影螢幕終端實現投影螢幕；尤其是在使用者設備原本就連接至公用網路的情況下，無需主動從公用網路切換至區域網路，有助於簡化使用者操作。在其他實施例中，伺服器回應於使用者設備發起的第二投影螢幕請求向該使用者設備返回的投影螢幕資訊，還可以用於在其他網路環境下透過投影螢幕終端進行投影螢幕，比如企業內部的私有網路或私人網路絡等，總之該網路環境區別於投影螢幕終端所存取的區域網路，且使用者設備無需從已存取網路切換至投影螢幕終端所存取的區域網路，即可實現投影螢幕。
在一實施例中，在伺服器已經將投影螢幕資訊提供至上述使用者設備之後，伺服器可能接收到其他設備發起的第三投影螢幕請求，且該第三投影螢幕請求中包含針對上述投影螢幕終端的設備投影螢幕碼，那麼當該第三投影螢幕資訊來自上述使用者設備的關聯設備時，伺服器可以判定該關聯設備的狀態與上述使用者設備相同或相似，比如該關聯設備與使用者設備均處於投影螢幕終端附近，因而伺服器無需向該關聯設備返回安全驗證碼，即可直接向該關聯設備返回針對投影螢幕終端的投影螢幕資訊。
其中，當某一設備滿足下述條件中至少之一時，可以將其判定為上述使用者設備的關聯設備：關聯設備的已登錄使用者與使用者設備的已登錄使用者的團體歸屬資訊一致，比如兩者屬於同一企業；關聯設備與使用者設備的地理位置相近，比如伺服器可以分別獲取兩台設備基於內置定位晶片採集的地理位置資訊，並比較確定兩者是否相近（例如地理位置相距不大於預設距離時，判定為相近）；第三投影螢幕請求的發起時刻與第二投影螢幕請求的發起時刻間隔不超出預設時長，此時使用者設備與關聯設備的使用者可能正處於同一會議中，該預設時長譬如可以為使用者設備的已登錄使用者設定的會議時長。例如，當同一企業內的多個使用者在同一會議室參與會議時，在其中某一使用者基於本說明書的技術方案獲得針對投影螢幕終端的投影螢幕資訊後，可以驗證其他使用者與該使用者處於同一企業且地理位置相近，那麼在其他使用者向伺服器發起上述的第三投影螢幕請求時，如果該第三投影螢幕請求的發起時刻與第二投影螢幕請求的發起時刻相近（如間隔不超出預設時長），那麼伺服器可以判定這些使用者處於同一會議中，因而可以直接向該其他使用者返回投影螢幕資訊。
圖3是一例示性實施例提供的一種投影螢幕終端側的投影螢幕方法的流程圖。如圖3所示，該方法應用於投影螢幕終端（例如圖1所示的投影螢幕終端14），可以包括以下步驟：
步驟302，投影螢幕終端顯示設備投影螢幕碼，所述設備投影螢幕碼唯一對應於所述投影螢幕終端，以由使用者設備向伺服器發起包含所述設備投影螢幕碼的第一投影螢幕請求。
在一實施例中，伺服器上運行有移動化團體辦公平台的伺服端、使用者設備和投影螢幕終端上分別運行有移動化團體辦公平台的用戶端，使得伺服器、使用者設備與投影螢幕終端之間可以基於該移動化團體辦公平台實現資料互動等操作，從而實現本說明書的投影螢幕方案。
在一實施例中，設備投影螢幕碼可由伺服器產生，並預先分配至各個投影螢幕終端；或者，設備投影螢幕碼可由投影螢幕終端按照預設方式在本地產生，並上傳至伺服器。總之，伺服器上記錄有各台投影螢幕終端與設備投影螢幕碼之間一一對應的映射關係，使得伺服器可以基於第一投影螢幕請求所含的設備投影螢幕碼精准且唯一地確定出相應的投影螢幕終端。
在一實施例中，投影螢幕終端具有顯示幕，可以將設備投影螢幕碼顯示於該顯示幕上，使得使用者設備的使用者可以查看到該設備投影螢幕碼，並將該設備投影螢幕碼輸入使用者設備中，以產生上述的第一投影螢幕請求。除了顯示於顯示幕上之外，投影螢幕終端還可以透過其他方式將設備投影螢幕碼告知該使用者，比如語音播報等，本說明書並不對此進行限制。其中，使用者設備可以向使用者顯示一輸入介面，以由使用者輸入裝置投影螢幕碼；或者，使用者設備可以採集使用者的輸入語音，並從該輸入語音中識別出設備投影螢幕碼；或者，使用者設備可以提供其他方式，以使得使用者完成對設備投影螢幕碼的輸入操作。
在一實施例中，使用者設備可以維護一歷史記錄，以用於記載使用者輸入過的所有設備投影螢幕碼。那麼，如果使用者在先前已經輸入過上述設備投影螢幕碼，就無需重新輸入，只需在使用者設備維護的歷史記錄中查找到上述的設備投影螢幕碼，即可據此產生上述的第一投影螢幕請求。
步驟304，所述投影螢幕終端接收伺服器推送的安全驗證碼，所述安全驗證碼由所述伺服器在收到所述第一投影螢幕請求且確定所述使用者設備存在安全風險的情況下推送至所述投影螢幕終端。
在一實施例中，伺服器可以透過預設方式識別使用者設備是否存在安全風險，比如伺服器可以在使用者設備未滿足下述投影螢幕條件中以下至少之一的情況下，判定使用者設備存在安全風險：使用者設備上的已登錄使用者（相當於使用者設備的使用者）與投影螢幕終端歸屬於同一團體（本說明書中的團體可以包括企業、學校、醫院、社團、政府機關等，本說明書並不對此進行限制）；已登錄使用者未處於投影螢幕終端所屬團體的投影螢幕黑名單；所述已登錄使用者處於所述投影螢幕終端所屬團體的投影螢幕白名單；已登錄使用者的請求頻率（第一投影螢幕請求的發送頻率）不大於第一預設頻率；使用者設備使用的網路（如公用網路或其他網路）未處於投影螢幕終端所屬團體的網路黑名單；使用者設備使用的網路處於投影螢幕終端所屬團體的網路白名單等，本說明書並不對此進行限制。對於存在安全風險的使用者設備，伺服器可以進一步透過安全驗證碼來驗證使用者設備的安全性，避免在安全性未知的情況下直接將針對投影螢幕終端的投影螢幕資訊提供至使用者設備，防止不安全的使用者設備基於該公用網路投影螢幕資訊隨意透過投影螢幕終端實施投影螢幕。
步驟306，所述投影螢幕終端顯示所述安全驗證碼，以使所述伺服器在收到所述使用者設備發起且包含所述安全驗證碼的第二投影螢幕請求的情況下，向所述使用者設備返回針對所述投影螢幕終端的投影螢幕資訊。
在一實施例中，透過將安全驗證碼推送至投影螢幕終端進行顯示，使得只有位於投影螢幕終端附近的使用者才能夠查看到安全驗證碼，並發起下述的第二投影螢幕請求，而避免未處於投影螢幕終端附近的非法使用者發起第二投影螢幕請求並獲得針對該投影螢幕終端的投影螢幕資訊。例如，當某一訪客到訪過某一企業後，該訪客可能使用並記錄了該企業內投影螢幕終端的設備投影螢幕碼，那麼在該訪客離開企業後，可以隨時透過設備投影螢幕碼向伺服器發起上述的第一投影螢幕請求，但是由於其無法獲得安全驗證碼而無法獲得針對投影螢幕終端的投影螢幕資訊，使得該訪客無論是有意或無意間操作，均無法針對該投影螢幕終端實施投影螢幕，可以防止其影響企業內員工對投影螢幕終端的正常使用。
在一實施例中，由於安全驗證碼被顯示於投影螢幕終端上，使得當使用者設備發起的第二投影螢幕請求包含該安全驗證碼時，表明該使用者設備及其使用者處於投影螢幕終端附近，否則無法獲得該安全驗證碼。因此，可以確定該使用者設備的安全風險消除或降低至可控程度，且即便出現隨意投影螢幕的情況也可以及時發現和制止，故而將投影螢幕資訊返回至該使用者設備，使得該使用者設備可以據此實現投影螢幕。
在一實施例中，投影螢幕終端可以接收伺服器推送的安全驗證碼對應的有效期，並在該有效期內對安全驗證碼進行顯示，而在有效期過後則終止顯示安全驗證碼；相應地，伺服器可以在有效期過後將上述安全驗證碼設為無效狀態，使得有效期過後收到的包含該安全驗證碼的投影螢幕請求無法被正常回應（即不會返回投影螢幕資訊）。基於上述有效期的管理，可以確保位於投影螢幕終端附近的使用者能夠及時讀取安全驗證碼並據此產生第二投影螢幕請求，同時避免該安全驗證碼被多次使用而增加安全性風險。
在一實施例中，伺服器在收到第一投影螢幕請求後，可以記錄該第一投影螢幕請求的發起方資訊（使用者設備及/或已登錄使用者）；以及，伺服器在收到包含安全驗證碼的第二投影螢幕請求後，可以獲取該第二投影螢幕請求的發起方資訊（使用者設備及/或已登錄使用者），並與第一投影螢幕請求的發起方資訊進行比較：如果一致，則返回投影螢幕資訊，否則不返回。據此，當投影螢幕終端附近的使用者A發起第一投影螢幕請求後，即便同樣位於投影螢幕終端附近的使用者B讀取安全驗證碼並提供至未處於投影螢幕終端附近的使用者C，該使用者C也無法基於該安全驗證碼獲得針對投影螢幕終端的投影螢幕資訊，即此時顯示出的安全驗證碼為使用者A專屬，從而避免了安全驗證碼被盜用的風險。
在一實施例中，向同一投影螢幕終端推送安全驗證碼的頻率可以被伺服器限制為不大於第二預設頻率。換言之，當針對某一投影螢幕終端推送安全驗證碼的頻率達到第二預設頻率時，伺服器將中止向該投影螢幕終端推送安全驗證碼，比如進入預設時長的冷卻狀態，以避免針對投影螢幕終端實施網路攻擊、提升安全性。進一步的，伺服器是在接收某一使用者使用的使用者設備發起的第一投影螢幕請求後，導致其頻繁（例如達到第二預設頻率）向上述投影螢幕終端推送安全驗證碼，那麼伺服器還可以提取出該使用者的帳號資訊及/或其使用的使用者設備的資訊（如IP位址、MAC位址等）並加入黑名單，使其無法繼續針對上述投影螢幕終端發起攻擊。
在一實施例中，伺服器回應於使用者設備發起的第二投影螢幕請求，可以向該使用者設備返回針對投影螢幕終端的公用網路投影螢幕資訊，使得使用者設備可以基於該公用網路投影螢幕資訊實現公用網路投影螢幕，那麼使用者設備只需連接至公用網路、無需與投影螢幕終端處於同一區域網路內，即可透過投影螢幕終端實現投影螢幕；尤其是在使用者設備原本就連接至公用網路的情況下，無需主動從公用網路切換至區域網路，有助於簡化使用者操作。在其他實施例中，伺服器回應於使用者設備發起的第二投影螢幕請求向該使用者設備返回的投影螢幕資訊，還可以用於在其他網路環境下透過投影螢幕終端進行投影螢幕，比如企業內部的私有網路或私人網路絡等，總之該網路環境區別於投影螢幕終端所存取的區域網路，且使用者設備無需從已存取網路切換至投影螢幕終端所存取的區域網路，即可實現投影螢幕。
圖4是一例示性實施例提供的另一種伺服器側的投影螢幕方法的流程圖。如圖4所示，該方法應用於伺服器（例如圖1所示的伺服器11），可以包括以下步驟：
步驟402，伺服器根據使用者設備發起的第一投影螢幕請求，確定所述第一投影螢幕請求所含設備投影螢幕碼對應的投影螢幕終端。
在一實施例中，伺服器上運行有移動化團體辦公平台的伺服端、使用者設備和投影螢幕終端上分別運行有移動化團體辦公平台的用戶端，使得伺服器、使用者設備與投影螢幕終端之間可以基於該移動化團體辦公平台實現資料互動等操作，從而實現本說明書的投影螢幕方案。
在一實施例中，設備投影螢幕碼可由伺服器產生，並預先分配至各個投影螢幕終端；或者，設備投影螢幕碼可由投影螢幕終端按照預設方式在本地產生，並上傳至伺服器。總之，伺服器上記錄有各台投影螢幕終端與設備投影螢幕碼之間一一對應的映射關係，使得伺服器可以基於第一投影螢幕請求所含的設備投影螢幕碼精准且唯一地確定出相應的投影螢幕終端。
在一實施例中，投影螢幕終端具有顯示幕，可以將設備投影螢幕碼顯示於該顯示幕上，使得使用者設備的使用者可以查看到該設備投影螢幕碼，並將該設備投影螢幕碼輸入使用者設備中，以產生上述的第一投影螢幕請求。除了顯示於顯示幕上之外，投影螢幕終端還可以透過其他方式將設備投影螢幕碼告知該使用者，比如語音播報等，本說明書並不對此進行限制。其中，使用者設備可以向使用者顯示一輸入介面，以由使用者輸入裝置投影螢幕碼；或者，使用者設備可以採集使用者的輸入語音，並從該輸入語音中識別出設備投影螢幕碼；或者，使用者設備可以提供其他方式，以使得使用者完成對設備投影螢幕碼的輸入操作。
在一實施例中，使用者設備可以維護一歷史記錄，以用於記載使用者輸入過的所有設備投影螢幕碼。那麼，如果使用者在先前已經輸入過上述設備投影螢幕碼，就無需重新輸入，只需在使用者設備維護的歷史記錄中查找到上述的設備投影螢幕碼，即可據此產生上述的第一投影螢幕請求。
步驟404，所述伺服器向所述投影螢幕終端推送安全驗證碼，以由所述投影螢幕終端對所述安全驗證碼進行顯示。
在一實施例中，伺服器針對收到的第一投影螢幕請求，總是向投影螢幕終端推送安全驗證碼，從而基於該安全驗證碼對使用者設備的安全性進行驗證。透過將安全驗證碼推送至投影螢幕終端進行顯示，使得只有位於投影螢幕終端附近的使用者才能夠查看到安全驗證碼，並發起下述的第二投影螢幕請求，而避免未處於投影螢幕終端附近的非法使用者發起第二投影螢幕請求並獲得針對該投影螢幕終端的投影螢幕資訊。例如，當某一訪客到訪過某一企業後，該訪客可能使用並記錄了該企業內投影螢幕終端的設備投影螢幕碼，那麼在該訪客離開企業後，可以隨時透過設備投影螢幕碼向伺服器發起上述的第一投影螢幕請求，但是由於其無法獲得安全驗證碼而無法獲得針對投影螢幕終端的投影螢幕資訊，使得該訪客無論是有意或無意間操作，均無法針對該投影螢幕終端實施投影螢幕，可以防止其影響企業內員工對投影螢幕終端的正常使用。
在一實施例中，伺服器可以透過預設方式識別使用者設備是否存在安全風險，從而僅在使用者設備存在安全風險的情況下向投影螢幕終端推送安全驗證碼，不存在安全風險的情況下則無需推送安全驗證碼。例如，伺服器可以在使用者設備未滿足下述投影螢幕條件中以下至少之一的情況下，判定使用者設備存在安全風險：使用者設備上的已登錄使用者（相當於使用者設備的使用者）與投影螢幕終端歸屬於同一團體（本說明書中的團體可以包括企業、學校、醫院、社團、政府機關等，本說明書並不對此進行限制）；已登錄使用者未處於投影螢幕終端所屬團體的投影螢幕黑名單；所述已登錄使用者處於所述投影螢幕終端所屬團體的投影螢幕白名單；已登錄使用者的請求頻率（第一投影螢幕請求的發送頻率）不大於第一預設頻率；使用者設備使用的網路（如公用網路或其他網路）未處於投影螢幕終端所屬團體的網路黑名單；使用者設備使用的網路處於投影螢幕終端所屬團體的網路白名單等，本說明書並不對此進行限制。對於存在安全風險的使用者設備，伺服器可以進一步透過安全驗證碼來驗證使用者設備的安全性，避免在安全性未知的情況下直接將針對投影螢幕終端的投影螢幕資訊提供至使用者設備，防止不安全的使用者設備基於該投影螢幕資訊隨意透過投影螢幕終端實施投影螢幕。
在一實施例中，伺服器可以在判定使用者設備存在安全風險的情況下，向使用者設備返回針對投影螢幕終端的區域網路投影螢幕資訊。此時，使用者設備如果加入了投影螢幕終端所處的區域網路或者該投影螢幕終端創建的區域網路，那麼該使用者設備可以利用上述的區域網路投影螢幕資訊實現基於該投影螢幕終端的投影螢幕操作；其中，由於區域網路的覆蓋區域有限，使得使用者設備及其使用者必然位於投影螢幕終端附近，即便發生隨意投影螢幕的情況也可以及時發現和制止，即安全風險處於可控程度。
在一實施例中，伺服器可以在使用者設備不存在安全風險的情況下，向使用者設備返回針對投影螢幕終端的投影螢幕資訊。比如，當使用者設備的已登錄使用者與投影螢幕終端歸屬於同一團體時，可以判定該使用者設備不存在安全風險，使得該使用者設備可以利用返回的投影螢幕資訊實現基於該投影螢幕終端的投影螢幕操作，而無需使該使用者設備連接至投影螢幕終端所處或所創建的區域網路。
步驟406，所述伺服器根據所述使用者設備發起且包含所述安全驗證碼的第二投影螢幕請求，向所述使用者設備返回針對所述投影螢幕終端的投影螢幕資訊。
在一實施例中，由於安全驗證碼被顯示於投影螢幕終端上，使得當使用者設備發起的第二投影螢幕請求包含該安全驗證碼時，表明該使用者設備及其使用者處於投影螢幕終端附近，否則無法獲得該安全驗證碼。因此，可以確定該使用者設備的安全風險消除或降低至可控程度，且即便出現隨意投影螢幕的情況也可以及時發現和制止，故而將投影螢幕資訊返回至該使用者設備，使得該使用者設備可以據此實現投影螢幕。
在一實施例中，伺服器可以向投影螢幕終端推送安全驗證碼對應的有效期，以使投影螢幕終端在該有效期內對安全驗證碼進行顯示，而在有效期過後則終止顯示安全驗證碼；相應地，伺服器可以在有效期過後將上述安全驗證碼設為無效狀態，使得有效期過後收到的包含該安全驗證碼的投影螢幕請求無法被正常回應（即不會返回投影螢幕資訊）。基於上述有效期的管理，可以確保位於投影螢幕終端附近的使用者能夠及時讀取安全驗證碼並據此產生第二投影螢幕請求，同時避免該安全驗證碼被多次使用而增加安全性風險。
在一實施例中，伺服器在收到第一投影螢幕請求後，可以記錄該第一投影螢幕請求的發起方資訊（使用者設備及/或已登錄使用者）；以及，伺服器在收到包含安全驗證碼的第二投影螢幕請求後，可以獲取該第二投影螢幕請求的發起方資訊（使用者設備及/或已登錄使用者），並與第一投影螢幕請求的發起方資訊進行比較：如果一致，則返回投影螢幕資訊，否則不返回。據此，當投影螢幕終端附近的使用者A發起第一投影螢幕請求後，即便同樣位於投影螢幕終端附近的使用者B讀取安全驗證碼並提供至未處於投影螢幕終端附近的使用者C，該使用者C也無法基於該安全驗證碼獲得針對投影螢幕終端的投影螢幕資訊，即此時顯示出的安全驗證碼為使用者A專屬，從而避免了安全驗證碼被盜用的風險。
在一實施例中，伺服器可以統計向同一投影螢幕終端推送安全驗證碼的頻率，以將該頻率限制為不大於第二預設頻率。換言之，當針對某一投影螢幕終端推送安全驗證碼的頻率達到第二預設頻率時，伺服器將中止向該投影螢幕終端推送安全驗證碼，比如進入預設時長的冷卻狀態，以避免針對投影螢幕終端實施網路攻擊、提升安全性。進一步的，伺服器是在接收某一使用者使用的使用者設備發起的第一投影螢幕請求後，導致其頻繁（例如達到第二預設頻率）向上述投影螢幕終端推送安全驗證碼，那麼伺服器還可以提取出該使用者的帳號資訊及/或其使用的使用者設備的資訊（如IP位址、MAC位址等）並加入黑名單，使其無法繼續針對上述投影螢幕終端發起攻擊。
在一實施例中，伺服器回應於使用者設備發起的第二投影螢幕請求，可以向該使用者設備返回針對投影螢幕終端的公用網路投影螢幕資訊，使得使用者設備可以基於該公用網路投影螢幕資訊實現公用網路投影螢幕，那麼使用者設備只需連接至公用網路、無需與投影螢幕終端處於同一區域網路內，即可透過投影螢幕終端實現投影螢幕；尤其是在使用者設備原本就連接至公用網路的情況下，無需主動從公用網路切換至區域網路，有助於簡化使用者操作。在其他實施例中，伺服器回應於使用者設備發起的第二投影螢幕請求向該使用者設備返回的投影螢幕資訊，還可以用於在其他網路環境下透過投影螢幕終端進行投影螢幕，比如企業內部的私有網路或私人網路絡等，總之該網路環境區別於投影螢幕終端所存取的區域網路，且使用者設備無需從已存取網路切換至投影螢幕終端所存取的區域網路，即可實現投影螢幕。
在一實施例中，在伺服器已經將投影螢幕資訊提供至上述使用者設備之後，伺服器可能接收到其他設備發起的第三投影螢幕請求，且該第三投影螢幕請求中包含針對上述投影螢幕終端的設備投影螢幕碼，那麼當該第三投影螢幕資訊來自上述使用者設備的關聯設備時，伺服器可以判定該關聯設備的狀態與上述使用者設備相同或相似，比如該關聯設備與使用者設備均處於投影螢幕終端附近，因而伺服器無需向該關聯設備返回安全驗證碼，即可直接向該關聯設備返回針對投影螢幕終端的投影螢幕資訊。
其中，當某一設備滿足下述條件中至少之一時，可以將其判定為上述使用者設備的關聯設備：關聯設備的已登錄使用者與使用者設備的已登錄使用者的團體歸屬資訊一致，比如兩者屬於同一企業；關聯設備與使用者設備的地理位置相近，比如伺服器可以分別獲取兩台設備基於內置定位晶片採集的地理位置資訊，並比較確定兩者是否相近（例如地理位置相距不大於預設距離時，判定為相近）；第三投影螢幕請求的發起時刻與第二投影螢幕請求的發起時刻間隔不超出預設時長，此時使用者設備與關聯設備的使用者可能正處於同一會議中，該預設時長譬如可以為使用者設備的已登錄使用者設定的會議時長。例如，當同一企業內的多個使用者在同一會議室參與會議時，在其中某一使用者基於本說明書的技術方案獲得針對投影螢幕終端的投影螢幕資訊後，可以驗證其他使用者與該使用者處於同一企業且地理位置相近，那麼在其他使用者向伺服器發起上述的第三投影螢幕請求時，如果該第三投影螢幕請求的發起時刻與第二投影螢幕請求的發起時刻相近（如間隔不超出預設時長），那麼伺服器可以判定這些使用者處於同一會議中，因而可以直接向該其他使用者返回投影螢幕資訊。
圖5A是一例示性實施例提供的另一種投影螢幕終端側的投影螢幕方法的流程圖。如圖5A所示，該方法應用於投影螢幕終端（例如圖1所示的投影螢幕終端14），可以包括以下步驟：
步驟502A，投影螢幕終端顯示設備投影螢幕碼，所述設備投影螢幕碼唯一對應於所述投影螢幕終端，以由使用者設備向伺服器發起包含所述設備投影螢幕碼的第一投影螢幕請求。
在一實施例中，伺服器上運行有移動化團體辦公平台的伺服端、使用者設備和投影螢幕終端上分別運行有移動化團體辦公平台的用戶端，使得伺服器、使用者設備與投影螢幕終端之間可以基於該移動化團體辦公平台實現資料互動等操作，從而實現本說明書的投影螢幕方案。
在一實施例中，設備投影螢幕碼可由伺服器產生，並預先分配至各個投影螢幕終端；或者，設備投影螢幕碼可由投影螢幕終端按照預設方式在本地產生，並上傳至伺服器。總之，伺服器上記錄有各台投影螢幕終端與設備投影螢幕碼之間一一對應的映射關係，使得伺服器可以基於第一投影螢幕請求所含的設備投影螢幕碼精准且唯一地確定出相應的投影螢幕終端。
在一實施例中，投影螢幕終端具有顯示幕，可以將設備投影螢幕碼顯示於該顯示幕上，使得使用者設備的使用者可以查看到該設備投影螢幕碼，並將該設備投影螢幕碼輸入使用者設備中，以產生上述的第一投影螢幕請求。除了顯示於顯示幕上之外，投影螢幕終端還可以透過其他方式將設備投影螢幕碼告知該使用者，比如語音播報等，本說明書並不對此進行限制。其中，使用者設備可以向使用者顯示一輸入介面，以由使用者輸入裝置投影螢幕碼；或者，使用者設備可以採集使用者的輸入語音，並從該輸入語音中識別出設備投影螢幕碼；或者，使用者設備可以提供其他方式，以使得使用者完成對設備投影螢幕碼的輸入操作。
在一實施例中，使用者設備可以維護一歷史記錄，以用於記載使用者輸入過的所有設備投影螢幕碼。那麼，如果使用者在先前已經輸入過上述設備投影螢幕碼，就無需重新輸入，只需在使用者設備維護的歷史記錄中查找到上述的設備投影螢幕碼，即可據此產生上述的第一投影螢幕請求。
步驟504A，所述投影螢幕終端接收伺服器推送的安全驗證碼，所述安全驗證碼由所述伺服器在收到所述第一投影螢幕請求的情況下推送至所述投影螢幕終端。
在一實施例中，伺服器針對收到的第一投影螢幕請求，總是向投影螢幕終端推送安全驗證碼，從而基於該安全驗證碼對使用者設備的安全性進行驗證。透過將安全驗證碼推送至投影螢幕終端進行顯示，使得只有位於投影螢幕終端附近的使用者才能夠查看到安全驗證碼，並發起下述的第二投影螢幕請求，而避免未處於投影螢幕終端附近的非法使用者發起第二投影螢幕請求並獲得針對該投影螢幕終端的投影螢幕資訊。例如，當某一訪客到訪過某一企業後，該訪客可能使用並記錄了該企業內投影螢幕終端的設備投影螢幕碼，那麼在該訪客離開企業後，可以隨時透過設備投影螢幕碼向伺服器發起上述的第一投影螢幕請求，但是由於其無法獲得安全驗證碼而無法獲得針對投影螢幕終端的投影螢幕資訊，使得該訪客無論是有意或無意間操作，均無法針對該投影螢幕終端實施投影螢幕，可以防止其影響企業內員工對投影螢幕終端的正常使用。
在一實施例中，伺服器可以透過預設方式識別使用者設備是否存在安全風險，比如伺服器可以在使用者設備未滿足下述投影螢幕條件中以下至少之一的情況下，判定使用者設備存在安全風險：使用者設備上的已登錄使用者（相當於使用者設備的使用者）與投影螢幕終端歸屬於同一團體（本說明書中的團體可以包括企業、學校、醫院、社團、政府機關等，本說明書並不對此進行限制）；已登錄使用者未處於投影螢幕終端所屬團體的投影螢幕黑名單；所述已登錄使用者處於所述投影螢幕終端所屬團體的投影螢幕白名單；已登錄使用者的請求頻率（第一投影螢幕請求的發送頻率）不大於第一預設頻率；使用者設備使用的網路（如公用網路或其他網路）未處於投影螢幕終端所屬團體的網路黑名單；使用者設備使用的網路處於投影螢幕終端所屬團體的網路白名單等，本說明書並不對此進行限制。對於存在安全風險的使用者設備，伺服器可以進一步透過安全驗證碼來驗證使用者設備的安全性，避免在安全性未知的情況下直接將針對投影螢幕終端的投影螢幕資訊提供至使用者設備，防止不安全的使用者設備基於該公用網路投影螢幕資訊隨意透過投影螢幕終端實施投影螢幕。
步驟506A，所述投影螢幕終端顯示所述安全驗證碼，以使所述伺服器在收到所述使用者設備發起且包含所述安全驗證碼的第二投影螢幕請求的情況下，向所述使用者設備返回針對所述投影螢幕終端的投影螢幕資訊。
在一實施例中，透過將安全驗證碼推送至投影螢幕終端進行顯示，使得只有位於投影螢幕終端附近的使用者才能夠查看到安全驗證碼，並發起下述的第二投影螢幕請求，而避免未處於投影螢幕終端附近的非法使用者發起第二投影螢幕請求並獲得針對該投影螢幕終端的投影螢幕資訊。例如，當某一訪客到訪過某一企業後，該訪客可能使用並記錄了該企業內投影螢幕終端的設備投影螢幕碼，那麼在該訪客離開企業後，可以隨時透過設備投影螢幕碼向伺服器發起上述的第一投影螢幕請求，但是由於其無法獲得安全驗證碼而無法獲得針對投影螢幕終端的投影螢幕資訊，使得該訪客無論是有意或無意間操作，均無法針對該投影螢幕終端實施投影螢幕，可以防止其影響企業內員工對投影螢幕終端的正常使用。
在一實施例中，由於安全驗證碼被顯示於投影螢幕終端上，使得當使用者設備發起的第二投影螢幕請求包含該安全驗證碼時，表明該使用者設備及其使用者處於投影螢幕終端附近，否則無法獲得該安全驗證碼。因此，可以確定該使用者設備的安全風險消除或降低至可控程度，且即便出現隨意投影螢幕的情況也可以及時發現和制止，故而將投影螢幕資訊返回至該使用者設備，使得該使用者設備可以據此實現投影螢幕。
在一實施例中，投影螢幕終端可以接收伺服器推送的安全驗證碼對應的有效期，並在該有效期內對安全驗證碼進行顯示，而在有效期過後則終止顯示安全驗證碼；相應地，伺服器可以在有效期過後將上述安全驗證碼設為無效狀態，使得有效期過後收到的包含該安全驗證碼的投影螢幕請求無法被正常回應（即不會返回投影螢幕資訊）。基於上述有效期的管理，可以確保位於投影螢幕終端附近的使用者能夠及時讀取安全驗證碼並據此產生第二投影螢幕請求，同時避免該安全驗證碼被多次使用而增加安全性風險。
在一實施例中，伺服器在收到第一投影螢幕請求後，可以記錄該第一投影螢幕請求的發起方資訊（使用者設備及/或已登錄使用者）；以及，伺服器在收到包含安全驗證碼的第二投影螢幕請求後，可以獲取該第二投影螢幕請求的發起方資訊（使用者設備及/或已登錄使用者），並與第一投影螢幕請求的發起方資訊進行比較：如果一致，則返回投影螢幕資訊，否則不返回。據此，當投影螢幕終端附近的使用者A發起第一投影螢幕請求後，即便同樣位於投影螢幕終端附近的使用者B讀取安全驗證碼並提供至未處於投影螢幕終端附近的使用者C，該使用者C也無法基於該安全驗證碼獲得針對投影螢幕終端的投影螢幕資訊，即此時顯示出的安全驗證碼為使用者A專屬，從而避免了安全驗證碼被盜用的風險。
在一實施例中，向同一投影螢幕終端推送安全驗證碼的頻率可以被伺服器限制為不大於第二預設頻率。換言之，當針對某一投影螢幕終端推送安全驗證碼的頻率達到第二預設頻率時，伺服器將中止向該投影螢幕終端推送安全驗證碼，比如進入預設時長的冷卻狀態，以避免針對投影螢幕終端實施網路攻擊、提升安全性。進一步的，伺服器是在接收某一使用者使用的使用者設備發起的第一投影螢幕請求後，導致其頻繁（例如達到第二預設頻率）向上述投影螢幕終端推送安全驗證碼，那麼伺服器還可以提取出該使用者的帳號資訊及/或其使用的使用者設備的資訊（如IP位址、MAC位址等）並加入黑名單，使其無法繼續針對上述投影螢幕終端發起攻擊。
在一實施例中，伺服器回應於使用者設備發起的第二投影螢幕請求，可以向該使用者設備返回針對投影螢幕終端的公用網路投影螢幕資訊，使得使用者設備可以基於該公用網路投影螢幕資訊實現公用網路投影螢幕，那麼使用者設備只需連接至公用網路、無需與投影螢幕終端處於同一區域網路內，即可透過投影螢幕終端實現投影螢幕；尤其是在使用者設備原本就連接至公用網路的情況下，無需主動從公用網路切換至區域網路，有助於簡化使用者操作。在其他實施例中，伺服器回應於使用者設備發起的第二投影螢幕請求向該使用者設備返回的投影螢幕資訊，還可以用於在其他網路環境下透過投影螢幕終端進行投影螢幕，比如企業內部的私有網路或私人網路絡等，總之該網路環境區別於投影螢幕終端所存取的區域網路，且使用者設備無需從已存取網路切換至投影螢幕終端所存取的區域網路，即可實現投影螢幕。
圖5B是一例示性實施例提供的一種使用者設備側的投影螢幕方法的流程圖。如圖5B所示，該方法應用於使用者設備（例如圖1所示的使用者設備13），可以包括以下步驟：
步驟502B，使用者設備根據投影螢幕終端顯示的設備投影螢幕碼，向伺服器發起包含所述設備投影螢幕碼的第一投影螢幕請求，以使所述伺服器基於所述設備投影螢幕碼確定出所述投影螢幕終端，並向所述投影螢幕終端推送安全驗證碼。
在一實施例中，伺服器上運行有移動化團體辦公平台的伺服端、使用者設備和投影螢幕終端上分別運行有移動化團體辦公平台的用戶端，使得伺服器、使用者設備與投影螢幕終端之間可以基於該移動化團體辦公平台實現資料互動等操作，從而實現本說明書的投影螢幕方案。
在一實施例中，設備投影螢幕碼可由伺服器產生，並預先分配至各個投影螢幕終端；或者，設備投影螢幕碼可由投影螢幕終端按照預設方式在本地產生，並上傳至伺服器。總之，伺服器上記錄有各台投影螢幕終端與設備投影螢幕碼之間一一對應的映射關係，使得伺服器可以基於第一投影螢幕請求所含的設備投影螢幕碼精准且唯一地確定出相應的投影螢幕終端。
在一實施例中，投影螢幕終端具有顯示幕，可以將設備投影螢幕碼顯示於該顯示幕上，使得使用者設備的使用者可以查看到該設備投影螢幕碼，並將該設備投影螢幕碼輸入使用者設備中，以產生上述的第一投影螢幕請求。除了顯示於顯示幕上之外，投影螢幕終端還可以透過其他方式將設備投影螢幕碼告知該使用者，比如語音播報等，本說明書並不對此進行限制。其中，使用者設備可以向使用者顯示一輸入介面，以由使用者輸入裝置投影螢幕碼；或者，使用者設備可以採集使用者的輸入語音，並從該輸入語音中識別出設備投影螢幕碼；或者，使用者設備可以提供其他方式，以使得使用者完成對設備投影螢幕碼的輸入操作。
其中，當投影螢幕終端對設備投影螢幕碼進行顯示時，使用者設備可以透過下述方式獲得該設備投影螢幕碼：在設備投影螢幕碼被顯示為二維條碼的情況下，使用者設備可以透過識別該二維條碼獲得設備投影螢幕碼；或者，在設備投影螢幕碼被顯示為字串的情況下，使用者設備可以透過採集並識別該字串，以獲得該設備投影螢幕碼；或者，使用者設備可以顯示輸入介面，並從該輸入介面接收到的使用者輸入資訊中獲得設備投影螢幕碼。
在一實施例中，使用者設備可以維護一歷史記錄，以用於記載使用者輸入過的所有設備投影螢幕碼。那麼，如果使用者在先前已經輸入過上述設備投影螢幕碼，就無需重新輸入，只需在使用者設備維護的歷史記錄中查找到上述的設備投影螢幕碼，即可據此產生上述的第一投影螢幕請求。
在一實施例中，伺服器針對收到的第一投影螢幕請求，總是向投影螢幕終端推送安全驗證碼，從而基於該安全驗證碼對使用者設備的安全性進行驗證。透過將安全驗證碼推送至投影螢幕終端進行顯示，使得只有位於投影螢幕終端附近的使用者才能夠查看到安全驗證碼，並發起下述的第二投影螢幕請求，而避免未處於投影螢幕終端附近的非法使用者發起第二投影螢幕請求並獲得針對該投影螢幕終端的投影螢幕資訊。例如，當某一訪客到訪過某一企業後，該訪客可能使用並記錄了該企業內投影螢幕終端的設備投影螢幕碼，那麼在該訪客離開企業後，可以隨時透過設備投影螢幕碼向伺服器發起上述的第一投影螢幕請求，但是由於其無法獲得安全驗證碼而無法獲得針對投影螢幕終端的投影螢幕資訊，使得該訪客無論是有意或無意間操作，均無法針對該投影螢幕終端實施投影螢幕，可以防止其影響企業內員工對投影螢幕終端的正常使用。
在一實施例中，伺服器可以透過預設方式識別使用者設備是否存在安全風險，從而僅在使用者設備存在安全風險的情況下向投影螢幕終端推送安全驗證碼，不存在安全風險的情況下則無需推送安全驗證碼。例如，伺服器可以在使用者設備未滿足下述投影螢幕條件中以下至少之一的情況下，判定使用者設備存在安全風險：使用者設備上的已登錄使用者（相當於使用者設備的使用者）與投影螢幕終端歸屬於同一團體（本說明書中的團體可以包括企業、學校、醫院、社團、政府機關等，本說明書並不對此進行限制）；已登錄使用者未處於投影螢幕終端所屬團體的投影螢幕黑名單；所述已登錄使用者處於所述投影螢幕終端所屬團體的投影螢幕白名單；已登錄使用者的請求頻率（第一投影螢幕請求的發送頻率）不大於第一預設頻率；使用者設備使用的網路（如公用網路或其他網路）未處於投影螢幕終端所屬團體的網路黑名單；使用者設備使用的網路處於投影螢幕終端所屬團體的網路白名單等，本說明書並不對此進行限制。對於存在安全風險的使用者設備，伺服器可以進一步透過安全驗證碼來驗證使用者設備的安全性，避免在安全性未知的情況下直接將針對投影螢幕終端的投影螢幕資訊提供至使用者設備，防止不安全的使用者設備基於該投影螢幕資訊隨意透過投影螢幕終端實施投影螢幕。
在一實施例中，伺服器可以在判定使用者設備存在安全風險的情況下，向使用者設備返回針對投影螢幕終端的區域網路投影螢幕資訊。此時，使用者設備如果加入了投影螢幕終端所處的區域網路或者該投影螢幕終端創建的區域網路，那麼該使用者設備可以利用上述的區域網路投影螢幕資訊實現基於該投影螢幕終端的投影螢幕操作；其中，由於區域網路的覆蓋區域有限，使得使用者設備及其使用者必然位於投影螢幕終端附近，即便發生隨意投影螢幕的情況也可以及時發現和制止，即安全風險處於可控程度。
在一實施例中，伺服器可以在使用者設備不存在安全風險的情況下，向使用者設備返回針對投影螢幕終端的投影螢幕資訊。比如，當使用者設備的已登錄使用者與投影螢幕終端歸屬於同一團體時，可以判定該使用者設備不存在安全風險，使得該使用者設備可以利用返回的投影螢幕資訊實現基於該投影螢幕終端的投影螢幕操作，而無需使該使用者設備連接至投影螢幕終端所處或所創建的區域網路。
步驟504B，所述使用者設備根據所述投影螢幕終端顯示的所述安全驗證碼，向所述伺服器發起包含所述安全驗證碼的第二投影螢幕請求。
步驟506B，所述使用者設備接收所述伺服器返回的針對所述投影螢幕終端的投影螢幕資訊，所述投影螢幕資訊由所述伺服器回應於所述第二投影螢幕請求而返回。
在一實施例中，由於安全驗證碼被顯示於投影螢幕終端上，使得當使用者設備發起的第二投影螢幕請求包含該安全驗證碼時，表明該使用者設備及其使用者處於投影螢幕終端附近，否則無法獲得該安全驗證碼。因此，可以確定該使用者設備的安全風險消除或降低至可控程度，且即便出現隨意投影螢幕的情況也可以及時發現和制止，故而將投影螢幕資訊返回至該使用者設備，使得該使用者設備可以據此實現投影螢幕。
與上述的設備投影螢幕碼相類似的，當投影螢幕終端對安全驗證碼進行顯示時，使用者設備可以透過下述方式獲得該安全驗證碼：在安全驗證碼被顯示為二維條碼的情況下，使用者設備可以透過識別該二維條碼獲得安全驗證碼；或者，在安全驗證碼被顯示為字串的情況下，使用者設備可以透過採集並識別該字串，以獲得該安全驗證碼；或者，使用者設備可以顯示輸入介面，並從該輸入介面接收到的使用者輸入資訊中獲得安全驗證碼。
在一實施例中，伺服器可以向投影螢幕終端推送安全驗證碼對應的有效期，以使投影螢幕終端在該有效期內對安全驗證碼進行顯示，而在有效期過後則終止顯示安全驗證碼；相應地，伺服器可以在有效期過後將上述安全驗證碼設為無效狀態，使得有效期過後收到的包含該安全驗證碼的投影螢幕請求無法被正常回應（即不會返回投影螢幕資訊）。基於上述有效期的管理，可以確保位於投影螢幕終端附近的使用者能夠及時讀取安全驗證碼並據此產生第二投影螢幕請求，同時避免該安全驗證碼被多次使用而增加安全性風險。
在一實施例中，伺服器在收到第一投影螢幕請求後，可以記錄該第一投影螢幕請求的發起方資訊（使用者設備及/或已登錄使用者）；以及，伺服器在收到包含安全驗證碼的第二投影螢幕請求後，可以獲取該第二投影螢幕請求的發起方資訊（使用者設備及/或已登錄使用者），並與第一投影螢幕請求的發起方資訊進行比較：如果一致，則返回投影螢幕資訊，否則不返回。據此，當投影螢幕終端附近的使用者A發起第一投影螢幕請求後，即便同樣位於投影螢幕終端附近的使用者B讀取安全驗證碼並提供至未處於投影螢幕終端附近的使用者C，該使用者C也無法基於該安全驗證碼獲得針對投影螢幕終端的投影螢幕資訊，即此時顯示出的安全驗證碼為使用者A專屬，從而避免了安全驗證碼被盜用的風險。
在一實施例中，伺服器可以統計向同一投影螢幕終端推送安全驗證碼的頻率，以將該頻率限制為不大於第二預設頻率。換言之，當針對某一投影螢幕終端推送安全驗證碼的頻率達到第二預設頻率時，伺服器將中止向該投影螢幕終端推送安全驗證碼，比如進入預設時長的冷卻狀態，以避免針對投影螢幕終端實施網路攻擊、提升安全性。進一步的，伺服器是在接收某一使用者使用的使用者設備發起的第一投影螢幕請求後，導致其頻繁（例如達到第二預設頻率）向上述投影螢幕終端推送安全驗證碼，那麼伺服器還可以提取出該使用者的帳號資訊及/或其使用的使用者設備的資訊（如IP位址、MAC位址等）並加入黑名單，使其無法繼續針對上述投影螢幕終端發起攻擊。
在一實施例中，伺服器回應於使用者設備發起的第二投影螢幕請求，可以向該使用者設備返回針對投影螢幕終端的公用網路投影螢幕資訊，使得使用者設備可以基於該公用網路投影螢幕資訊實現公用網路投影螢幕，那麼使用者設備只需連接至公用網路、無需與投影螢幕終端處於同一區域網路內，即可透過投影螢幕終端實現投影螢幕；尤其是在使用者設備原本就連接至公用網路的情況下，無需主動從公用網路切換至區域網路，有助於簡化使用者操作。在其他實施例中，伺服器回應於使用者設備發起的第二投影螢幕請求向該使用者設備返回的投影螢幕資訊，還可以用於在其他網路環境下透過投影螢幕終端進行投影螢幕，比如企業內部的私有網路或私人網路絡等，總之該網路環境區別於投影螢幕終端所存取的區域網路，且使用者設備無需從已存取網路切換至投影螢幕終端所存取的區域網路，即可實現投影螢幕。
假定使用者Ua使用的使用者設備為筆記型電腦，而投影螢幕終端具體可以採用投影螢幕盒子的產品形態，該使用者Ua可以嘗試在筆記型電腦與投影螢幕盒子之間建立網路連接，以將筆記型電腦上的顯示內容投至投影螢幕盒子所連的電視螢幕上。以即時通訊應用T為例，筆記型電腦上可以運行該即時通訊應用T的用戶端1、投影螢幕盒子上可以運行該即時通訊應用T的用戶端2，而伺服器上可以運行該即時通訊應用T的伺服端，使得筆記型電腦、投影螢幕盒子與伺服器之間可以基於該即時通訊應用T實現資料互動，下面結合圖6進行描述。其中，圖6是一例示性實施例提供的一種實現公用網路投影螢幕的互動示意圖。如圖6所示，筆記型電腦、投影螢幕盒子與伺服器之間的互動過程可以包括以下步驟：
步驟601，伺服器向投影螢幕盒子分配投影螢幕碼。
在一實施例中，伺服器可以按照預設方式產生投影螢幕碼，並透過將投影螢幕碼分配至投影螢幕盒子，以在投影螢幕盒子與投影螢幕碼之間建立起對應關係。由於所有投影螢幕盒子對應的投影螢幕碼均由伺服器產生和分配，使得伺服器可以確保各個投影螢幕盒子對應的投影螢幕碼互不相同，從而在投影螢幕盒子與投影螢幕碼之間建立起一一對應的映射關係，並使得該映射關係被維護於伺服器處。
步驟602，投影螢幕盒子顯示被分配的投影螢幕碼。
在一實施例中，投影螢幕盒子可以具備顯示幕，使得該投影螢幕盒子可以在顯示幕上顯示被分配的投影螢幕碼。或者，投影螢幕盒子可以將被分配的投影螢幕碼顯示於所連的電視或其他顯示裝置上。例如圖7所示，在投影螢幕盒子形成的投影螢幕資訊顯示介面700中，可以在顯示區域71內顯示相關提示資訊，以指示使用者實施無線投影螢幕、會議室預訂、掃碼投影螢幕等操作，而在顯示區域721中可以示出投影螢幕碼和區域網路WiFi的名稱等資訊，譬如圖7中的投影螢幕碼為32562。此外，投影螢幕資訊顯示介面700還可以包括其他資訊，比如在顯示區域722內示出會議室名稱和預訂資訊等，以及在顯示區域723內示出供掃碼投影螢幕的二維條碼等信息。
當然，除了採用顯示的方式之外，投影螢幕盒子還可以採用其他方式向使用者Ua提供該投影螢幕碼，比如語音播報等，本說明書並不對此進行限制。
步驟603，筆記型電腦將已輸入的投影螢幕碼上傳至伺服器。
在一實施例中，筆記型電腦可以接收使用者Ua輸入的投影螢幕碼，並上傳至伺服器。例如，筆記型電腦可以向伺服器發起第一投影螢幕請求，並在該第一投影螢幕請求中攜帶使用者Ua輸入的投影螢幕碼。
在一實施例中，筆記型電腦可以顯示一介面，使得使用者Ua可以將投影螢幕碼輸入該介面中；或者，筆記型電腦可以採集使用者Ua語音，並從使用者Ua語音中識別出投影螢幕碼，同樣可使使用者Ua完成對投影螢幕碼的輸入；或者，筆記型電腦可以在使用者Ua的觸發下採集投影螢幕盒子的投影螢幕碼播報語音，並從該投影螢幕碼播報語音中識別出投影螢幕碼，相當於使用者Ua完成對投影螢幕碼的輸入。類似地，使用者Ua還可以透過其他方式輸入驗證碼，此處不再一一贅述。
步驟604，伺服器根據收到的投影螢幕碼，確定相應的投影螢幕盒子。
在一實施例中，基於伺服器上維護的如前文所述的映射關係，伺服器可以確定出所收到的投影螢幕碼（由使用者Ua上傳）對應的投影螢幕盒子。
步驟605，伺服器確定使用者Ua和投影螢幕盒子的團體歸屬情況。
在一實施例中，假定使用者Ua、投影螢幕盒子分別存在相應的團體歸屬情況。而伺服器維護有各個團體的組織架構資訊（包括團體所含成員的資訊和綁定至該團體的投影螢幕盒子等智慧設備的資訊），使得伺服器可以獲知使用者Ua和上述投影螢幕盒子的該團體歸屬情況。
假定使用者Ua為企業AA的員工，而投影螢幕盒子被綁定為該企業AA的智慧設備，使得伺服器可以確定該使用者Ua與該投影螢幕盒子的團體歸屬資訊一致；假定使用者Ua為企業AA的員工，而投影螢幕盒子被綁定為企業BB的智慧設備，使得伺服器可以確定該使用者Ua與該投影螢幕盒子的團體歸屬資訊不一致。
當使用者Ua與投影螢幕盒子的團體歸屬資訊一致時，使用者Ua對投影螢幕盒子實施不安全操作的機率相對較低，伺服器可以判定使用者Ua具有高安全性；以及，當使用者Ua與投影螢幕盒子的團體歸屬資訊不一致時，即該使用者Ua為針對投影螢幕盒子的訪客，使用者Ua對該投影螢幕盒子實施不安全操作的機率相對較高，伺服器可以判定使用者Ua具有低安全性。
當然，伺服器還可以基於其他維度對使用者Ua進行安全性判斷，此處僅以團體歸屬資訊為例。
步驟606a，當使用者Ua具有高安全性時，伺服器向筆記型電腦返回公用網路投影螢幕資訊。
在一實施例中，公用網路投影螢幕資訊可以包括筆記型電腦與上述投影螢幕盒子之間建立網路連接、實現公用網路投影螢幕的資訊，比如設備UID等，本說明書並不對此進行限制。總之，基於伺服器所提供的公用網路投影螢幕資訊，筆記型電腦與投影螢幕盒子無需處於同一區域網路內，即可透過公用網路實現網路連接，並進而使得筆記型電腦可以透過投影螢幕盒子進行投影螢幕，將筆記型電腦上的螢幕顯示內容同步顯示於投影螢幕盒子所連接的電視螢幕上。
步驟606b，當使用者Ua具有低安全性時，伺服器向投影螢幕盒子發放驗證碼。
在一實施例中，伺服器所發放的驗證碼具有隨機性，使得該驗證碼無法被猜測或類比產生，具有很高的安全性。
步驟606c，當使用者Ua具有低安全性時，伺服器還可以向筆記型電腦返回區域網路投影螢幕資訊。
在一實施例中，如果使用者Ua確實處於投影螢幕盒子附近，並且筆記型電腦與投影螢幕盒子連接至同一區域網路，那麼該筆記型電腦可以基於區域網路投影螢幕資訊向投影螢幕盒子進行投影螢幕。
步驟607，投影螢幕盒子顯示收到的驗證碼。
在一實施例中，在如圖7所示的投影螢幕資訊顯示介面700中，還可以包括驗證碼顯示區域73，而投影螢幕盒子可以將驗證碼顯示於該驗證碼顯示區域73內，譬如圖7中的驗證碼為5839。
在一實施例中，當使用者Ua屬於訪客時，該使用者Ua可能存在的安全性風險在於：在使用者Ua可能並未處於投影螢幕盒子附近，比如該使用者Ua可能曾經到訪企業BB並輸入過投影螢幕盒子的投影螢幕碼，使得該使用者Ua出於誤操作（如選錯歷史記錄）而執行了上述的步驟603，或者使用者Ua可能惡意執行了上述的步驟603，總之如果伺服器直接將公用網路投影螢幕資訊提供至使用者Ua，那麼使用者Ua可能透過公用網路向投影螢幕盒子進行隨意投影螢幕，從而對企業BB內部造成干擾。因此，透過基於驗證碼的二次驗證過程，使得只有位於投影螢幕盒子附近的使用者才能夠獲知驗證碼的內容，那麼當使用者Ua未處於投影螢幕盒子附近時，就無法完成二次驗證而無法得到公用網路投影螢幕資訊、避免使用者Ua對企業BB造成干擾，而當使用者Ua確實處於投影螢幕盒子附近時，可以順利得到公用網路投影螢幕資訊，確保使用者Ua能夠順利實施投影螢幕操作。
步驟608，筆記型電腦將已輸入的驗證碼上傳至伺服器。
在一實施例中，使用者Ua針對驗證碼的輸入過程、筆記型電腦將驗證碼上傳至伺服器的過程，均可以參考步驟603中針對投影螢幕碼的相關操作，此處不再贅述。
步驟609，伺服器驗證上傳內容。
在一實施例中，伺服器驗證收到的驗證碼是否與發放至投影螢幕盒子的驗證碼相同，如果相同則表明通過驗證，否則未通過驗證。
在一實施例中，伺服器可以為驗證碼設定有效期，比如自驗證碼的發放時刻起60s內有效；那麼，當驗證碼的內容相同且接收時刻處於有效期內時，伺服器判定為通過驗證，否則未通過驗證。
在一實施例中，當伺服器是基於使用者Ua的請求而發放驗證碼時，伺服器可以進一步識別收到的驗證碼是否由使用者Ua上傳，如果並非使用者Ua上傳則未通過驗證；如果由使用者Ua上傳且驗證碼的內容相同（還可以進一步結合上述的有效期），則伺服器判定為通過驗證。
步驟610，伺服器向筆記型電腦返回公用網路投影螢幕資訊，使得筆記型電腦向投影螢幕盒子進行公用網路投影螢幕。
在一實施例中，可以參考上述的步驟606a，此處不再贅述。
在本說明書的實施例中，當使用者設備向伺服器發起包含設備投影螢幕碼的第一投影螢幕請求後，伺服器可以基於設備投影螢幕碼確定出相應的投影螢幕終端，並且可以透過向該投影螢幕終端發送安全驗證碼，以驗證使用者設備是否處於該投影螢幕終端附近，而避免向遠端的使用者設備提供針對該投影螢幕終端的投影螢幕資訊，防止出現安全問題。
假定使用者設備的使用者在某地的會議室，該使用者可以透過該會議室內的投影螢幕終端實現本地投影螢幕。而如果參與會議的還包括外地會議室的其他人員，那麼該使用者還可以透過使用者設備向外地會議室的投影螢幕終端進行投影螢幕，此時可由外地會議室的參會人員獲取當地的投影螢幕終端上的設備投影螢幕碼、告知上述使用者，由該使用者向伺服器發起包含該設備投影螢幕碼的投影螢幕請求（相當於第一投影螢幕請求），而伺服器向外地會議室的投影螢幕終端發送安全驗證碼後，同樣可以由外地會議室的參會人員獲取當地的投影螢幕終端上的安全驗證碼、告知上述使用者，使得該使用者向伺服器發起包含該安全驗證碼的投影螢幕請求（相當於第二投影螢幕請求），進而獲得針對外地會議室的投影螢幕終端的投影螢幕資訊。那麼，使用者透過同一台使用者設備可以分別向本地、外地的投影螢幕終端進行投影螢幕，便於遠端會議的順利進行。
在一些場景下，將安全驗證碼發送至投影螢幕設備時，可能造成安全驗證碼處於容易被洩露的狀態。因此，伺服器可以將安全驗證碼發送至特定物件，使得只有該特定物件能夠獲知安全驗證碼；比如，可以推送至區別於第一投影螢幕請求的發起方之外的特定使用者使用的手機等使用者設備上，並由該特定使用者決定是否轉交給第一投影螢幕請求的發起方。例如，在家庭場景中，當未成年人發起第一投影螢幕請求時，透過將安全驗證碼發送至家長的手機，可由家長對未成年人的投影螢幕操作予以合理控制和管理。再例如，在大型會議場景中，當發言者發起第一投影螢幕請求時，透過將安全驗證碼發送至會議組織者或主持人的手機，可以避免安全驗證碼被非發言者獲得，確保只有發言者能夠實施投影螢幕。類似地，透過對安全驗證碼的合理發送，可以限制安全驗證碼的暴露範圍，以提升安全性。
進一步地，上述特定物件的數量可以為多個。為了確保各個特定物件之間不會同時投影螢幕、產生衝突，可以對安全驗證碼的發送時刻予以控制，錯開各個特定物件獲得安全驗證碼的時刻。例如，當某個會議存在多個發言者時，可以按照預先約定的會議進程，在某個發言者對應的發言時段到達或即將到達時，才向該發言者提供安全驗證碼，避免在後發言者提前投影螢幕而干擾在先發言者。
除了基於安全驗證碼的實施方式之外，還可以透過其他方式驗證使用者設備是否處於投影螢幕終端附近。例如，當使用者設備與投影螢幕終端均支援NFC功能時，使用者可以將使用者設備靠近或觸碰投影螢幕終端，使得投影螢幕終端可以基於NFC獲取該使用者設備或其已登錄使用者的資訊，並提供至伺服器；而伺服器在判定與投影螢幕終端透過NFC互動的使用者設備是第一投影螢幕請求的發起方時，即可向第一投影螢幕請求的發起方返回投影螢幕資訊。再例如，使用者可以在投影螢幕終端附近發出聲音，而投影螢幕終端在採集到音訊資料後，可以在本地提取聲紋特徵後上傳至伺服器，或者將音訊資料上傳至伺服器並由伺服器提取出聲紋特徵，而伺服器可以基於聲紋特徵判定該使用者的身份資訊：如果該使用者的身份與第一投影螢幕請求的發起方相同，那麼說明第一投影螢幕請求的發起方位於投影螢幕終端附近，伺服器可以向第一投影螢幕請求的發起方返回投影螢幕資訊。
對於會議室投影螢幕的應用場景，可以結合會議室預約資訊，控制參會者的投影螢幕操作。例如，伺服器可以獲取針對各個會議室的預約資訊，該預約資訊可以包括會議室使用時段、參會人員等，使得參會人員在預約的會議室使用時段內向伺服器發起針對會議室內的投影螢幕終端的第一投影螢幕請求（包含該投影螢幕終端對應的設備投影螢幕碼）時，伺服器可以直接返回針對投影螢幕終端的投影螢幕資訊；而對於預約資訊中未包含的臨時參會人員，如果同樣是針對上述會議室內的投影螢幕終端發起第一投影螢幕請求，那麼伺服器可以基於本說明書的技術方案，向該投影螢幕終端發送安全驗證碼，從而在臨時參會人員再次發起包含該安全驗證碼的第二投影螢幕請求時，伺服器才會向臨時參會人員返回投影螢幕資訊。
對於會議室投影螢幕的應用場景，可以結合會議室預約資訊與驗證操作，控制參會者的投影螢幕操作。例如，伺服器可以獲取針對各個會議室的預約資訊，該預約資訊可以包括會議室使用時段、參會人員等，使得伺服器可以提前向參會人員的使用者設備下發安全驗證碼（比如預約成功後即可下發），而參會人員的使用者設備可以向伺服器發起包含該安全驗證碼的投影螢幕請求，使得伺服器可以將投影螢幕請求的發起方（即上述參會人員）標記為已通過驗證。然後，當參會人員前往預約的會議室參與會議時，可以向伺服器發起針對會議室內的投影螢幕終端的第一投影螢幕請求（包含該投影螢幕終端對應的設備投影螢幕碼），而伺服器在確定第一投影螢幕請求的發起方被標記為已通過驗證時，可以直接返回針對投影螢幕終端的投影螢幕資訊，從而透過將驗證操作提前實施，簡化了參會人員在實際投影螢幕過程中的操作。伺服器在將某一參會人員標記為已通過驗證時，可以具有時效性，比如僅在預約資訊中指示的會議時間段內有效，而超出會議時間段（未到達該會議時間段，或者會議時間段已結束）時標記為未通過驗證，從而避免對其他時間段內使用投票終端的使用者造成影響。當然，對於預約資訊中未包含的臨時參會人員（或者雖然包含在預約資訊中但並未提前實施驗證的參會人員），如果針對上述會議室的投影螢幕終端發起第一投影螢幕請求（包含該投影螢幕終端的設備投影螢幕碼），那麼伺服器可以基於本說明書的技術方案，向該投影螢幕終端發送安全驗證碼，從而在臨時參會人員（或未驗證參會人員）再次發起包含該安全驗證碼的第二投影螢幕請求時，伺服器才會向臨時參會人員（或未驗證參會人員）返回投影螢幕資訊。
圖8是一例示性實施例提供的一種設備的示意結構圖。請參考圖8，在硬體層面，該設備包括處理器802、內部匯流排804、網路介面806、內部記憶體808以及非揮發性記憶體810，當然還可能包括其他業務所需要的硬體。處理器802從非揮發性記憶體810中讀取對應的電腦程式到內部記憶體808中然後運行，在邏輯層面上形成投影螢幕裝置。當然，除了軟體實現方式之外，本說明書一個或多個實施例並不排除其他實現方式，比如邏輯裝置抑或軟硬體結合的方式等等，也就是說以下處理流程的執行主體並不限定於各個邏輯單元，也可以是硬體或邏輯裝置。
請參考圖9，在軟體實施方式中，該投影螢幕裝置可以包括：
確定單元91，使伺服器根據使用者設備發起的第一投影螢幕請求，確定所述第一投影螢幕請求所含設備投影螢幕碼對應的投影螢幕終端；
第一推送單元92，使所述伺服器在所述使用者設備存在安全風險的情況下，向所述投影螢幕終端推送安全驗證碼，以由所述投影螢幕終端對所述安全驗證碼進行顯示；
第一返回單元93，使所述伺服器根據所述使用者設備發起且包含所述安全驗證碼的第二投影螢幕請求，向所述使用者設備返回針對所述投影螢幕終端的投影螢幕資訊。
可選的，所述設備投影螢幕碼由所述投影螢幕終端產生；或者，所述設備投影螢幕碼由所述伺服器預先分配至所述投影螢幕終端。
可選的，所述伺服器在所述使用者設備未滿足下述投影螢幕條件中以下至少之一的情況下，判定所述使用者設備存在安全風險：
所述使用者設備上的已登錄使用者與所述投影螢幕終端歸屬於同一團體；
所述已登錄使用者未處於所述投影螢幕終端所屬團體的投影螢幕黑名單；
所述已登錄使用者處於所述投影螢幕終端所屬團體的投影螢幕白名單；
所述已登錄使用者的請求頻率不大於第一預設頻率；
所述使用者設備使用的網路未處於所述投影螢幕終端所屬團體的網路黑名單；
所述使用者設備使用的網路處於所述投影螢幕終端所屬團體的網路白名單。
可選的，還包括：
第二返回單元94，使所述伺服器在所述使用者設備存在安全風險的情況下，向所述使用者設備返回針對所述投影螢幕終端的區域網路投影螢幕資訊。
可選的，還包括：
統計單元95，使所述伺服器統計向同一投影螢幕終端推送安全驗證碼的頻率，以將所述頻率限制為不大於第二預設頻率。
可選的，還包括：
第三返回單元96，使所述伺服器在所述使用者設備不存在安全風險的情況下，向所述使用者設備返回針對所述投影螢幕終端的投影螢幕資訊。
可選的，還包括：
第二推送單元97，所述伺服器向所述投影螢幕終端推送所述安全驗證碼對應的有效期，以使所述投影螢幕終端在所述有效期內對所述安全驗證碼進行顯示。
可選的，所述投影螢幕資訊包括公用網路投影螢幕資訊。
可選的，還包括：
接收單元98，使所述伺服器收到第三投影螢幕請求，所述第三投影螢幕請求來自所述使用者設備的關聯設備，且所述第三投影螢幕請求包含對應於所述投影螢幕終端的設備投影螢幕碼；
第四返回單元99，使所述伺服器向所述關聯設備返回針對所述投影螢幕終端的投影螢幕資訊。
可選的，所述關聯設備滿足下述條件中至少之一：
所述關聯設備的已登錄使用者與所述使用者設備的已登錄使用者的團體歸屬資訊一致；
所述關聯設備與所述使用者設備的地理位置相近；
所述第三投影螢幕請求的發起時刻與所述第二投影螢幕請求的發起時刻間隔不超出預設時長。
圖10是一例示性實施例提供的一種設備的示意結構圖。請參考圖10，在硬體層面，該設備包括處理器1002、內部匯流排1004、網路介面1006、內部記憶體1008以及非揮發性記憶體1010，當然還可能包括其他業務所需要的硬體。處理器1002從非揮發性記憶體1010中讀取對應的電腦程式到內部記憶體1008中然後運行，在邏輯層面上形成投影螢幕裝置。當然，除了軟體實現方式之外，本說明書一個或多個實施例並不排除其他實現方式，比如邏輯裝置抑或軟硬體結合的方式等等，也就是說以下處理流程的執行主體並不限定於各個邏輯單元，也可以是硬體或邏輯裝置。
請參考圖11，在軟體實施方式中，該投影螢幕裝置可以包括：
確定單元1101，使伺服器根據使用者設備發起的第一投影螢幕請求，確定所述第一投影螢幕請求所含設備投影螢幕碼對應的投影螢幕終端；
推送單元1102，使所述伺服器向所述投影螢幕終端推送安全驗證碼，以由所述投影螢幕終端對所述安全驗證碼進行顯示；
返回單元1103，使所述伺服器根據所述使用者設備發起且包含所述安全驗證碼的第二投影螢幕請求，向所述使用者設備返回針對所述投影螢幕終端的投影螢幕資訊。
圖12是一例示性實施例提供的一種設備的示意結構圖。請參考圖12，在硬體層面，該設備包括處理器1202、內部匯流排1204、網路介面1206、內部記憶體1208以及非揮發性記憶體1210，當然還可能包括其他業務所需要的硬體。處理器1202從非揮發性記憶體1210中讀取對應的電腦程式到內部記憶體1208中然後運行，在邏輯層面上形成投影螢幕裝置。當然，除了軟體實現方式之外，本說明書一個或多個實施例並不排除其他實現方式，比如邏輯裝置抑或軟硬體結合的方式等等，也就是說以下處理流程的執行主體並不限定於各個邏輯單元，也可以是硬體或邏輯裝置。
請參考圖13，在軟體實施方式中，該投影螢幕裝置可以包括：
投影螢幕碼顯示單元1301，使投影螢幕終端顯示設備投影螢幕碼，所述設備投影螢幕碼唯一對應於所述投影螢幕終端，以由使用者設備向伺服器發起包含所述設備投影螢幕碼的第一投影螢幕請求；
接收單元1302，使所述投影螢幕終端接收伺服器推送的安全驗證碼，所述安全驗證碼由所述伺服器在收到所述第一投影螢幕請求且確定所述使用者設備存在安全風險的情況下推送至所述投影螢幕終端；
驗證碼顯示單元1303，使所述投影螢幕終端顯示所述安全驗證碼，以使所述伺服器在收到所述使用者設備發起且包含所述安全驗證碼的第二投影螢幕請求的情況下，向所述使用者設備返回針對所述投影螢幕終端的投影螢幕資訊。
圖14是一例示性實施例提供的一種設備的示意結構圖。請參考圖14，在硬體層面，該設備包括處理器1402、內部匯流排1404、網路介面1406、內部記憶體1408以及非揮發性記憶體1410，當然還可能包括其他業務所需要的硬體。處理器1402從非揮發性記憶體1410中讀取對應的電腦程式到內部記憶體1408中然後運行，在邏輯層面上形成投影螢幕裝置。當然，除了軟體實現方式之外，本說明書一個或多個實施例並不排除其他實現方式，比如邏輯裝置抑或軟硬體結合的方式等等，也就是說以下處理流程的執行主體並不限定於各個邏輯單元，也可以是硬體或邏輯裝置。
請參考圖15，在軟體實施方式中，該投影螢幕裝置可以包括：
投影螢幕碼顯示單元1501，使投影螢幕終端顯示設備投影螢幕碼，所述設備投影螢幕碼唯一對應於所述投影螢幕終端，以由使用者設備向伺服器發起包含所述設備投影螢幕碼的第一投影螢幕請求；
接收單元1502，使所述投影螢幕終端接收伺服器推送的安全驗證碼，所述安全驗證碼由所述伺服器在收到所述第一投影螢幕請求的情況下推送至所述投影螢幕終端；
驗證碼顯示單元1503，使所述投影螢幕終端顯示所述安全驗證碼，以使所述伺服器在收到所述使用者設備發起且包含所述安全驗證碼的第二投影螢幕請求的情況下，向所述使用者設備返回針對所述投影螢幕終端的投影螢幕資訊。
圖16是一例示性實施例提供的一種設備的示意結構圖。請參考圖16，在硬體層面，該設備包括處理器1602、內部匯流排1604、網路介面1606、內部記憶體1608以及非揮發性記憶體1610，當然還可能包括其他業務所需要的硬體。處理器1602從非揮發性記憶體1610中讀取對應的電腦程式到內部記憶體1608中然後運行，在邏輯層面上形成投影螢幕裝置。當然，除了軟體實現方式之外，本說明書一個或多個實施例並不排除其他實現方式，比如邏輯裝置抑或軟硬體結合的方式等等，也就是說以下處理流程的執行主體並不限定於各個邏輯單元，也可以是硬體或邏輯裝置。
請參考圖17，在軟體實施方式中，該投影螢幕裝置可以包括：
第一請求單元1701，使使用者設備根據投影螢幕終端顯示的設備投影螢幕碼，向伺服器發起包含所述設備投影螢幕碼的第一投影螢幕請求，以使所述伺服器基於所述設備投影螢幕碼確定出所述投影螢幕終端，並向所述投影螢幕終端推送安全驗證碼；
第二請求單元1702，使所述使用者設備根據所述投影螢幕終端顯示的所述安全驗證碼，向所述伺服器發起包含所述安全驗證碼的第二投影螢幕請求；
接收單元1703，使所述使用者設備接收所述伺服器返回的針對所述投影螢幕終端的投影螢幕資訊，所述投影螢幕資訊由所述伺服器回應於所述第二投影螢幕請求而返回。
可選的，第一請求單元1701透過下述方式獲得所述設備投影螢幕碼：
在所述設備投影螢幕碼被顯示為二維條碼的情況下，使所述使用者設備透過識別所述二維條碼獲得所述設備投影螢幕碼；或，
在所述設備投影螢幕碼被顯示為字串的情況下，使所述使用者設備透過採集並識別所述字串，以獲得所述設備投影螢幕碼；或，
使所述使用者設備顯示輸入介面，並從所述輸入介面接收到的使用者輸入資訊中獲得所述設備投影螢幕碼。
可選的，第二請求單元1702透過下述方式獲得所述安全驗證碼：
在所述安全驗證碼被顯示為二維條碼的情況下，使所述使用者設備透過識別所述二維條碼獲得所述安全驗證碼；或，
在所述安全驗證碼被顯示為字串的情況下，使所述使用者設備透過採集並識別所述字串，以獲得所述安全驗證碼；或，
使所述使用者設備顯示輸入介面，並從所述輸入介面接收到的使用者輸入資訊中獲得所述安全驗證碼。
上述實施例闡明的系統、裝置、模組或單元，具體可以由電腦晶片或實體實現，或者由具有某種功能的產品來實現。一種典型的實現設備為電腦，電腦的具體形式可以是個人電腦、膝上型電腦、蜂巢式電話、相機電話、智慧型電話、個人數位助理、媒體播放器、導航設備、電子郵件收發設備、遊戲主機、平板電腦、可穿戴設備或者這些設備中的任意幾種設備的組合。
在一個典型的配置中，電腦包括一個或多個處理器(CPU)、輸入/輸出介面、網路介面和內部記憶體。
內部記憶體可能包括電腦可讀媒體中的非永久性記憶體，隨機存取記憶體(RAM)及/或非揮發性內部記憶體等形式，如唯讀記憶體(ROM)或快閃記憶體(flash RAM)。內部記憶體是電腦可讀媒體的實例。
電腦可讀媒體包括永久性和非永久性、可移動和非可移動媒體可以由任何方法或技術來實現資訊儲存。資訊可以是電腦可讀指令、資料結構、程式的模組或其他資料。電腦的儲存媒體的例子包括，但不限於相變記憶體(PRAM)、靜態隨機存取記憶體(SRAM)、動態隨機存取記憶體(DRAM)、其他類型的隨機存取記憶體(RAM)、唯讀記憶體(ROM)、電可抹除可程式唯讀記憶體(EEPROM)、快閃記憶體或其他內部記憶體技術、唯讀光碟唯讀記憶體(CD-ROM)、數位多功能光碟(DVD)或其他光學儲存器、磁盒式磁帶、磁碟儲存器、量子記憶體、基於石墨烯的儲存媒體或其他磁性儲存設備或任何其他非傳輸媒體，可用於儲存可以被計算設備存取的資訊。按照本文中的界定，電腦可讀媒體不包括暫態媒體(transitory media)，如調變的數據訊號和載波。
還需要說明的是，術語“包括”、“包含”或者其任何其他變體意在涵蓋非排他性的包含，從而使得包括一系列要素的過程、方法、商品或者設備不僅包括那些要素，而且還包括沒有明確列出的其他要素，或者是還包括為這種過程、方法、商品或者設備所固有的要素。在沒有更多限制的情況下，由語句“包括一個……”限定的要素，並不排除在包括所述要素的過程、方法、商品或者設備中還存在另外的相同要素。
上述對本說明書特定實施例進行了描述。其它實施例在所附申請專利範圍的範圍內。在一些情況下，在申請專利範圍中記載的動作或步驟可以按照不同於實施例中的順序來執行並且仍然可以實現期望的結果。另外，在附圖中描繪的過程不一定要求示出的特定順序或者連續順序才能實現期望的結果。在某些實施方式中，多工處理和並行處理也是可以的或者可能是有利的。
在本說明書一個或多個實施例使用的術語是僅僅出於描述特定實施例的目的，而非旨在限制本說明書一個或多個實施例。在本說明書一個或多個實施例和所附申請專利範圍中所使用的單數形式的“一種”、“所述”和“該”也旨在包括多數形式，除非上下文清楚地表示其他含義。還應當理解，本文中使用的術語“及/或”是指並包含一個或多個相關聯的列出專案的任何或所有可能組合。
應當理解，儘管在本說明書一個或多個實施例可能採用術語第一、第二、第三等來描述各種資訊，但這些資訊不應限於這些術語。這些術語僅用來將同一類型的資訊彼此區分開。例如，在不脫離本說明書一個或多個實施例範圍的情況下，第一資訊也可以被稱為第二資訊，類似地，第二資訊也可以被稱為第一資訊。取決於語境，如在此所使用的詞語“如果”可以被解釋成為“在……時”或“當……時”或“回應於確定”。
以上所述僅為本說明書一個或多個實施例的較佳實施例而已，並不用以限制本說明書一個或多個實施例，凡在本說明書一個或多個實施例的精神和原則之內，所做的任何修改、等同替換、改進等，均應包含在本說明書一個或多個實施例保護的範圍之內。Illustrative embodiments will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with one or more embodiments of this specification. On the contrary, they are only examples of devices and methods consistent with some aspects of one or more embodiments of this specification as detailed in the scope of the appended application.
It should be noted that in other embodiments, the steps of the corresponding method are not necessarily executed in the order shown and described in this specification. In some other embodiments, the method may include more or fewer steps than described in this specification. In addition, a single step described in this specification may be decomposed into multiple steps for description in other embodiments; and multiple steps described in this specification may also be combined into a single step in other embodiments. description.
FIG. 1 is a schematic structural diagram of a projection screen system provided by an exemplary embodiment. As shown in FIG. 1, the system may include a server 11, a network 12, a user equipment 13, a projection screen terminal 14 and a display device 15.
The server 11 may be a physical server including an independent host, or the server 11 may be a virtual server carried by a host cluster. During operation, the server 11 can run a program on the server side of an application to realize the related business functions of the application. For example, when the server 11 runs the program of a mobile group office platform, it can be implemented as the mobile The server side of the centralized office platform.
In this embodiment, the mobile group office platform can not only realize the communication function, but also can be used as an integrated function platform for many other functions, such as for approval events (such as leave, office item application, finance and other approval events), attendance events One or more embodiments of this specification do not limit the processing of group events such as task events, log events, and projection screen events. More specifically, the mobile group office platform can be carried by instant messaging applications in related technologies, such as Enterprise Instant Messaging (EIM) applications. Of course, the instant messaging function is only one of the communication functions supported by the mobile group office platform. The mobile group office platform can also implement more other functions such as those mentioned above, which will not be repeated here.
The network 12 may include multiple types of wired or wireless networks. In an embodiment, the network 12 may include a public switched telephone network (PSTN) and the Internet. The user equipment 13 can interact with the server 11 through the network 12, the projection screen terminal 14 can interact with the server 11 through the network 12, and the user equipment 13 can interact with the projection screen terminal 14 through the network 12.
The user equipment 13 may include electronic devices such as the following types: tablet devices, notebook computers, palmtop computers (PDAs, Personal Digital Assistants), wearable devices (such as smart glasses, smart watches, etc.), etc., one or more of this manual Various embodiments do not limit this. During the operation, the user equipment 13 can run a program on the client side of an application to realize the related business functions of the application. For example, when the electronic device runs the program of the mobile group office platform, it can be realized as the mobile The user side of the office platform of a standardized group.
The projection screen terminal 14 may be a wireless access point (Access Point, AP) with independent network management capabilities, or the network device 11 may include a wireless access point and a wireless controller for management and control of the wireless access point (Wireless Access Point Controller, AC), this manual does not limit this. During operation, the projection screen terminal 14 can maintain a local area network, so that the user equipment 13 can establish a connection with the projection screen terminal 14 based on the local area network to realize the projection screen function. Or, during operation, the projection screen terminal 14 and the user equipment 13 can access the network 12 at the same time, and the network 12 can be a public network (such as the Internet), so that the user equipment 13 can be based on the network 12 Establish a connection with the projection screen terminal 14 to realize the projection screen function. Wherein, the projection screen terminal 14 also establishes a connection with the display device 15. The connection may include a wired connection or a wireless connection. For example, the wireless connection can be realized based on the Bluetooth protocol or the WIFI protocol, so that the projection screen terminal 14 can transfer the data from the user equipment 13 The content of the projection screen is transmitted to the display device 15 for display by the display device 15.
The display device 15 may include a projector, a conference panel, a television, etc., which is not limited in this specification. In scenarios such as lectures and conferences, the screen size of the display device 15 is usually larger than the screen size of the user equipment 13, so that multiple users or users at a distance can view the display content of the display device 15; In some scenarios, the display device 15 may also include user equipment such as mobile phones and laptops used by other participants, and these participants can directly watch the projected screen content on their respective user equipment.
FIG. 2 is a flowchart of a method for projecting a screen on the server side according to an exemplary embodiment. As shown in Fig. 2, the method is applied to a server (for example, the server 11 shown in Fig. 1), and may include the following steps:
In step 202, the server determines the projection screen terminal corresponding to the device projection screen code included in the first projection screen request according to the first projection screen request initiated by the user equipment.
In one embodiment, the server running the mobile corporate office platform, the user equipment and the projection screen terminal run the client terminal of the mobile corporate office platform respectively, so that the server, the user equipment and the projection screen The terminals can realize data interaction and other operations based on the mobile group office platform, so as to realize the projection screen solution of this manual.
In one embodiment, the device projection screen code can be generated by the server and allocated to each projection screen terminal in advance; or, the device projection screen code can be generated locally by the projection screen terminal according to a preset method and uploaded to the server. In short, the server records a one-to-one mapping relationship between each projection screen terminal and the device projection screen code, so that the server can accurately and uniquely determine the corresponding projection screen code based on the device projection screen code included in the first projection screen request Projection screen terminal.
In one embodiment, the projection screen terminal has a display screen that can display the device projection screen code on the display screen, so that the user of the user equipment can view the device projection screen code and input the device projection screen code In the user equipment, the above-mentioned first projection screen request is generated. In addition to being displayed on the display screen, the projection screen terminal can also inform the user of the device projection screen code through other methods, such as voice broadcast, etc. This manual does not limit this. Wherein, the user equipment may display an input interface to the user to project the screen code from the user input device; or the user equipment may collect the input voice of the user and recognize the device projection screen code from the input voice; Alternatively, the user equipment may provide other methods to enable the user to complete the input operation of the device projection screen code.
In one embodiment, the user equipment may maintain a historical record for recording all equipment projection screen codes input by the user. Then, if the user has previously entered the projection screen code of the above device, there is no need to re-enter it. Just look up the projection screen code of the above device in the history record maintained by the user’s device, and then the above first projection screen code can be generated accordingly. Projection screen request.
Step 204: The server pushes a security verification code to the projection screen terminal when the user equipment has a security risk, so that the projection screen terminal displays the security verification code.
In one embodiment, the server can identify whether the user equipment has a security risk through a preset method. For example, the server can determine the user equipment when the user equipment does not meet at least one of the following projection screen conditions There is a security risk: the registered user on the user equipment (equivalent to the user of the user equipment) and the projection screen terminal belong to the same group (groups in this manual can include companies, schools, hospitals, associations, government agencies, etc.) , This manual does not limit this); the logged-in user is not on the projection screen blacklist of the community to which the projection screen terminal belongs; the logged-in user is on the projection screen whitelist of the community to which the projection screen terminal belongs; logged in to use The request frequency of the user (the sending frequency of the first projection screen request) is not greater than the first preset frequency; the network used by the user equipment (such as a public network or other network) is not in the network black of the organization to which the projection screen terminal belongs List; the network used by the user equipment is in the network whitelist of the organization to which the projection screen terminal belongs, etc. This manual does not restrict this. For user equipment with security risks, the server can further verify the security of the user equipment through the security verification code, so as to avoid directly providing the projection screen information for the projection screen terminal to the user equipment when the security is unknown. Prevent unsafe user equipment from randomly implementing a projection screen through the projection screen terminal based on the projection screen information.
In one embodiment, the security verification code is pushed to the projection screen terminal for display, so that only users located near the projection screen terminal can view the security verification code, and initiate the following second projection screen request to avoid An illegal user who is not near the projection screen terminal initiates a second projection screen request and obtains projection screen information for the projection screen terminal. For example, when a visitor visits a certain company, the visitor may use and record the device projection screen code of the projection screen terminal in the company. Then, after the visitor leaves the company, he can use the device projection screen code to report to the server at any time. The device initiates the aforementioned first projection screen request, but it cannot obtain the projection screen information for the projection screen terminal because it cannot obtain the security verification code, so that the visitor cannot perform projection on the projection screen terminal regardless of whether it is intentional or unintentional. The screen can prevent it from affecting the normal use of the projection screen terminal by the employees in the enterprise.
In one embodiment, the server may return the local network projection screen information for the projection screen terminal to the user equipment when it determines that the user equipment has a security risk. At this time, if the user equipment is added to the local area network where the projection screen terminal is located or the local area network created by the projection screen terminal, then the user equipment can use the above-mentioned local network projection screen information to realize based on the projection screen terminal Projection screen operation; among them, due to the limited coverage area of the local network, the user equipment and its users must be located near the projection screen terminal. Even if the random projection screen occurs, it can be detected and stopped in time, that is, the security risk is Degree of control.
In one embodiment, the server can return the projection screen information for the projection screen terminal to the user equipment when there is no security risk to the user equipment. For example, when the logged-in user of the user equipment and the projection screen terminal belong to the same group, it can be determined that the user equipment does not have a security risk, so that the user equipment can use the returned projection screen information to realize the basis of the projection screen terminal The projection screen operation without the need to connect the user equipment to the local area network where the projection screen terminal is located or created.
Step 206: The server returns the projection screen information for the projection screen terminal to the user equipment according to the second projection screen request initiated by the user equipment and containing the security verification code.
In one embodiment, since the security verification code is displayed on the projection screen terminal, when the second projection screen request initiated by the user equipment includes the security verification code, it indicates that the user equipment and its user are in the projection screen terminal Nearby, otherwise the security verification code cannot be obtained. Therefore, it can be determined that the security risk of the user equipment is eliminated or reduced to a controllable level, and even the random projection of the screen can be detected and stopped in time, so the projection screen information is returned to the user equipment, so that the user The equipment can realize the projection screen accordingly.
In one embodiment, the server may push the validity period corresponding to the security verification code to the projection screen terminal, so that the projection screen terminal displays the security verification code within the validity period, and stops displaying the security verification code after the validity period expires; accordingly; , The server can invalidate the above security verification code after the validity period, so that the projection screen request containing the security verification code received after the validity period cannot be responded to normally (that is, the projection screen information will not be returned). Based on the above-mentioned validity period management, it can be ensured that users located near the projection screen terminal can read the security verification code in time and generate a second projection screen request accordingly, while avoiding the security verification code being used multiple times and increasing security risks.
In one embodiment, after receiving the first projection screen request, the server may record the initiator information (user equipment and/or logged-in user) of the first projection screen request; After the second projection screen request containing the security verification code, the initiator information (user equipment and/or logged-in user) of the second projection screen request can be obtained and compared with the initiator information of the first projection screen request : If they are the same, then return to the projection screen information, otherwise do not return. Accordingly, when user A near the projection screen terminal initiates the first projection screen request, even user B who is also near the projection screen terminal reads the security verification code and provides it to user C who is not near the projection screen terminal. The user C also cannot obtain the projection screen information for the projection screen terminal based on the security verification code, that is, the security verification code displayed at this time is exclusive to the user A, thereby avoiding the risk of the security verification code being stolen.
In an embodiment, the server may count the frequency of pushing the security verification code to the same projection screen terminal, so as to limit the frequency to not greater than the second preset frequency. In other words, when the frequency of pushing the security verification code for a certain projection screen terminal reaches the second preset frequency, the server will stop pushing the security verification code to the projection screen terminal, for example, enter the cooling state for a preset time to avoid targeting The projection screen terminal implements cyber attacks and improves security. Further, after the server receives the first projection screen request initiated by the user equipment used by a user, it causes it to frequently (for example, reach the second preset frequency) to push the security verification code to the projection screen terminal, then the server The device can also extract the user's account information and/or the information of the user equipment (such as IP address, MAC address, etc.) used by the user and add it to the blacklist, so that it cannot continue to attack the above-mentioned projection screen terminal.
In one embodiment, in response to the second projection screen request initiated by the user equipment, the server can return to the user equipment public network projection screen information for the projection screen terminal, so that the user equipment can be based on the public network The projection screen information realizes the public network projection screen, then the user equipment only needs to be connected to the public network and does not need to be in the same local network as the projection screen terminal, and the projection screen can be realized through the projection screen terminal; especially on the user equipment When originally connected to a public network, there is no need to actively switch from a public network to a local area network, which helps simplify user operations. In other embodiments, the server responds to the second projection screen request initiated by the user equipment to return the projection screen information to the user equipment, which can also be used to project the screen through the projection screen terminal in other network environments, such as The private network or private network within the enterprise, etc., in short, the network environment is different from the local network accessed by the projection screen terminal, and the user equipment does not need to switch from the accessed network to the projection screen terminal access The local area network can realize the projection screen.
In one embodiment, after the server has provided the projection screen information to the above-mentioned user equipment, the server may receive a third projection screen request initiated by another device, and the third projection screen request includes a request for the above-mentioned projection screen. The terminal’s device projection screen code, then when the third projection screen information comes from the associated device of the aforementioned user equipment, the server can determine that the status of the associated device is the same as or similar to the aforementioned user equipment, such as the associated device and the user The devices are all near the projection screen terminal, so the server does not need to return a security verification code to the associated device, and can directly return the projection screen information for the projection screen terminal to the associated device.
Among them, when a certain device meets at least one of the following conditions, it can be determined as the associated device of the above-mentioned user equipment: the registered user of the associated device and the registered user of the user equipment have the same community affiliation information, For example, the two belong to the same company; the associated equipment and the user equipment are geographically close. For example, the server can separately obtain the geographical information collected by the two equipment based on the built-in positioning chip, and compare to determine whether the two are similar (for example, the geographical position is not the same). When the distance is greater than the preset distance, it is judged to be similar); the interval between the initiation time of the third projection screen request and the initiation time of the second projection screen request does not exceed the preset time period. At this time, the user of the user device and the associated device may be in In the same conference, the preset duration may be, for example, the conference duration set by the logged-in user of the user equipment. For example, when multiple users in the same company participate in a meeting in the same conference room, after one of the users obtains the projection screen information for the projection screen terminal based on the technical solution of this manual, it can verify that other users and the use If the user is in the same company and the geographic location is close, then when other users initiate the above third projection screen request to the server, if the initiation time of the third projection screen request is close to the initiation time of the second projection screen request (such as interval Within the preset duration), the server can determine that these users are in the same meeting, and can directly return the projection screen information to the other users.
FIG. 3 is a flowchart of a projection screen method on a projection screen terminal side according to an exemplary embodiment. As shown in FIG. 3, the method is applied to a projection screen terminal (for example, the projection screen terminal 14 shown in FIG. 1), and may include the following steps:
In step 302, the projection screen terminal displays a device projection screen code, the device projection screen code uniquely corresponding to the projection screen terminal, so that the user equipment initiates a first projection screen request including the device projection screen code to the server.
In one embodiment, the server running the mobile corporate office platform, the user equipment and the projection screen terminal run the client terminal of the mobile corporate office platform respectively, so that the server, the user equipment and the projection screen The terminals can realize data interaction and other operations based on the mobile group office platform, so as to realize the projection screen solution of this manual.
In one embodiment, the device projection screen code can be generated by the server and allocated to each projection screen terminal in advance; or, the device projection screen code can be generated locally by the projection screen terminal according to a preset method and uploaded to the server. In short, the server records a one-to-one mapping relationship between each projection screen terminal and the device projection screen code, so that the server can accurately and uniquely determine the corresponding projection screen code based on the device projection screen code included in the first projection screen request Projection screen terminal.
In one embodiment, the projection screen terminal has a display screen that can display the device projection screen code on the display screen, so that the user of the user equipment can view the device projection screen code and input the device projection screen code In the user equipment, the above-mentioned first projection screen request is generated. In addition to being displayed on the display screen, the projection screen terminal can also inform the user of the device projection screen code through other methods, such as voice broadcast, etc. This manual does not limit this. Wherein, the user equipment may display an input interface to the user to project the screen code from the user input device; or the user equipment may collect the input voice of the user and recognize the device projection screen code from the input voice; Alternatively, the user equipment may provide other methods to enable the user to complete the input operation of the device projection screen code.
In one embodiment, the user equipment may maintain a historical record for recording all equipment projection screen codes input by the user. Then, if the user has previously entered the projection screen code of the above device, there is no need to re-enter it. Just look up the projection screen code of the above device in the history record maintained by the user’s device, and then the above first projection screen code can be generated accordingly. Projection screen request.
Step 304: The projection screen terminal receives a security verification code pushed by a server, and the security verification code is used by the server when the server receives the first projection screen request and determines that the user equipment has a security risk Push to the projection screen terminal.
In one embodiment, the server can identify whether the user equipment has a security risk through a preset method. For example, the server can determine the user equipment when the user equipment does not meet at least one of the following projection screen conditions There is a security risk: the registered user on the user equipment (equivalent to the user of the user equipment) and the projection screen terminal belong to the same group (groups in this manual can include companies, schools, hospitals, associations, government agencies, etc.) , This manual does not limit this); the logged-in user is not on the projection screen blacklist of the community to which the projection screen terminal belongs; the logged-in user is on the projection screen whitelist of the community to which the projection screen terminal belongs; logged in to use The request frequency of the user (the sending frequency of the first projection screen request) is not greater than the first preset frequency; the network used by the user equipment (such as a public network or other network) is not in the network black of the organization to which the projection screen terminal belongs List; the network used by the user equipment is in the network whitelist of the organization to which the projection screen terminal belongs, etc. This manual does not restrict this. For user equipment with security risks, the server can further verify the security of the user equipment through the security verification code, so as to avoid directly providing the projection screen information for the projection screen terminal to the user equipment when the security is unknown. Prevent unsafe user equipment from projecting screen information based on the public network projection screen at will through the projection screen terminal.
Step 306: The projection screen terminal displays the security verification code, so that the server, upon receiving a second projection screen request initiated by the user equipment and containing the security verification code, sends the security verification code to the The user equipment returns projection screen information for the projection screen terminal.
In one embodiment, the security verification code is pushed to the projection screen terminal for display, so that only users located near the projection screen terminal can view the security verification code, and initiate the following second projection screen request to avoid An illegal user who is not near the projection screen terminal initiates a second projection screen request and obtains projection screen information for the projection screen terminal. For example, when a visitor visits a certain company, the visitor may use and record the device projection screen code of the projection screen terminal in the company. Then, after the visitor leaves the company, he can use the device projection screen code to report to the server at any time. The device initiates the aforementioned first projection screen request, but it cannot obtain the projection screen information for the projection screen terminal because it cannot obtain the security verification code, so that the visitor cannot perform projection on the projection screen terminal regardless of whether it is intentional or unintentional. The screen can prevent it from affecting the normal use of the projection screen terminal by the employees in the enterprise.
In one embodiment, since the security verification code is displayed on the projection screen terminal, when the second projection screen request initiated by the user equipment includes the security verification code, it indicates that the user equipment and its user are in the projection screen terminal Nearby, otherwise the security verification code cannot be obtained. Therefore, it can be determined that the security risk of the user equipment is eliminated or reduced to a controllable level, and even the random projection of the screen can be detected and stopped in time, so the projection screen information is returned to the user equipment, so that the user The equipment can realize the projection screen accordingly.
In one embodiment, the projection screen terminal may receive the validity period corresponding to the security verification code pushed by the server, and display the security verification code within the validity period, and stop displaying the security verification code after the validity period expires; accordingly, the server The above security verification code can be set to an invalid state after the validity period expires, so that the projection screen request containing the security verification code received after the validity period cannot be responded to normally (that is, the projection screen information will not be returned). Based on the above-mentioned validity period management, it can be ensured that users located near the projection screen terminal can read the security verification code in time and generate a second projection screen request accordingly, while avoiding the security verification code being used multiple times and increasing security risks.
In one embodiment, after receiving the first projection screen request, the server may record the initiator information (user equipment and/or logged-in user) of the first projection screen request; After the second projection screen request containing the security verification code, the initiator information (user equipment and/or logged-in user) of the second projection screen request can be obtained and compared with the initiator information of the first projection screen request : If they are the same, then return to the projection screen information, otherwise do not return. Accordingly, when user A near the projection screen terminal initiates the first projection screen request, even user B who is also near the projection screen terminal reads the security verification code and provides it to user C who is not near the projection screen terminal. The user C also cannot obtain the projection screen information for the projection screen terminal based on the security verification code, that is, the security verification code displayed at this time is exclusive to the user A, thereby avoiding the risk of the security verification code being stolen.
In an embodiment, the frequency of pushing the security verification code to the same projection screen terminal may be limited by the server to not be greater than the second preset frequency. In other words, when the frequency of pushing the security verification code for a certain projection screen terminal reaches the second preset frequency, the server will stop pushing the security verification code to the projection screen terminal, for example, enter the cooling state for a preset time to avoid targeting The projection screen terminal implements cyber attacks and improves security. Further, after the server receives the first projection screen request initiated by the user equipment used by a user, it causes it to frequently (for example, reach the second preset frequency) to push the security verification code to the projection screen terminal, then the server The device can also extract the user's account information and/or the information of the user equipment (such as IP address, MAC address, etc.) used by the user and add it to the blacklist, so that it cannot continue to attack the above-mentioned projection screen terminal.
In one embodiment, in response to the second projection screen request initiated by the user equipment, the server can return to the user equipment public network projection screen information for the projection screen terminal, so that the user equipment can be based on the public network The projection screen information realizes the public network projection screen, then the user equipment only needs to be connected to the public network and does not need to be in the same local network as the projection screen terminal, and the projection screen can be realized through the projection screen terminal; especially on the user equipment When originally connected to a public network, there is no need to actively switch from a public network to a local area network, which helps simplify user operations. In other embodiments, the server responds to the second projection screen request initiated by the user equipment to return the projection screen information to the user equipment, which can also be used to project the screen through the projection screen terminal in other network environments, such as The private network or private network within the enterprise, etc., in short, the network environment is different from the local network accessed by the projection screen terminal, and the user equipment does not need to switch from the accessed network to the projection screen terminal access The local area network can realize the projection screen.
FIG. 4 is a flowchart of another server-side projection screen method provided by an exemplary embodiment. As shown in Fig. 4, the method is applied to a server (for example, the server 11 shown in Fig. 1), and may include the following steps:
In step 402, the server determines the projection screen terminal corresponding to the device projection screen code included in the first projection screen request according to the first projection screen request initiated by the user equipment.
In one embodiment, the server running the mobile corporate office platform, the user equipment and the projection screen terminal run the client terminal of the mobile corporate office platform respectively, so that the server, the user equipment and the projection screen The terminals can realize data interaction and other operations based on the mobile group office platform, so as to realize the projection screen solution of this manual.
In one embodiment, the device projection screen code can be generated by the server and allocated to each projection screen terminal in advance; or, the device projection screen code can be generated locally by the projection screen terminal according to a preset method and uploaded to the server. In short, the server records a one-to-one mapping relationship between each projection screen terminal and the device projection screen code, so that the server can accurately and uniquely determine the corresponding projection screen code based on the device projection screen code included in the first projection screen request Projection screen terminal.
In one embodiment, the projection screen terminal has a display screen that can display the device projection screen code on the display screen, so that the user of the user equipment can view the device projection screen code and input the device projection screen code In the user equipment, the above-mentioned first projection screen request is generated. In addition to being displayed on the display screen, the projection screen terminal can also inform the user of the device projection screen code through other methods, such as voice broadcast, etc. This manual does not limit this. Wherein, the user equipment may display an input interface to the user to project the screen code from the user input device; or the user equipment may collect the input voice of the user and recognize the device projection screen code from the input voice; Alternatively, the user equipment may provide other methods to enable the user to complete the input operation of the device projection screen code.
In one embodiment, the user equipment may maintain a historical record for recording all equipment projection screen codes input by the user. Then, if the user has previously entered the projection screen code of the above device, there is no need to re-enter it. Just look up the projection screen code of the above device in the history record maintained by the user’s device, and then the above first projection screen code can be generated accordingly. Projection screen request.
Step 404: The server pushes a security verification code to the projection screen terminal, so that the projection screen terminal displays the security verification code.
In one embodiment, the server always pushes a security verification code to the projection screen terminal in response to the received first projection screen request, so as to verify the security of the user equipment based on the security verification code. By pushing the security verification code to the projection screen terminal for display, only users located near the projection screen terminal can view the security verification code, and initiate the following second projection screen request to avoid not being near the projection screen terminal The illegal user initiates a second projection screen request and obtains projection screen information for the projection screen terminal. For example, when a visitor visits a certain company, the visitor may use and record the device projection screen code of the projection screen terminal in the company. Then, after the visitor leaves the company, he can use the device projection screen code to report to the server at any time. The device initiates the aforementioned first projection screen request, but it cannot obtain the projection screen information for the projection screen terminal because it cannot obtain the security verification code, so that the visitor cannot perform projection on the projection screen terminal regardless of whether it is intentional or unintentional. The screen can prevent it from affecting the normal use of the projection screen terminal by the employees in the enterprise.
In one embodiment, the server can identify whether the user equipment has a security risk through a preset method, so that the security verification code is only pushed to the projection screen terminal when the user equipment has a security risk, and there is no security risk. There is no need to push the security verification code. For example, the server can determine that the user equipment has a security risk when the user equipment does not meet at least one of the following projection screen conditions: the logged-in user on the user equipment (equivalent to the use of the user equipment It belongs to the same group as the projection screen terminal (groups in this manual can include companies, schools, hospitals, societies, government agencies, etc. This manual does not restrict this); the logged-in user is not in the group to which the projection screen terminal belongs The blacklist of the projection screen; the logged-in user is in the whitelist of the projection screen of the group to which the projection screen terminal belongs; the request frequency of the logged-in user (the sending frequency of the first projection screen request) is not greater than the first preset frequency ; The network used by the user equipment (such as a public network or other network) is not in the network blacklist of the group to which the projection screen terminal belongs; the network used by the user equipment is in the network white list of the group to which the projection screen terminal belongs, etc. , This manual does not limit this. For user equipment with security risks, the server can further verify the security of the user equipment through the security verification code, so as to avoid directly providing the projection screen information for the projection screen terminal to the user equipment when the security is unknown. Prevent unsafe user equipment from randomly implementing a projection screen through the projection screen terminal based on the projection screen information.
In one embodiment, the server may return the local network projection screen information for the projection screen terminal to the user equipment when it determines that the user equipment has a security risk. At this time, if the user equipment is added to the local area network where the projection screen terminal is located or the local area network created by the projection screen terminal, then the user equipment can use the above-mentioned local network projection screen information to realize based on the projection screen terminal Projection screen operation; among them, due to the limited coverage area of the local network, the user equipment and its users must be located near the projection screen terminal. Even if the random projection screen occurs, it can be detected and stopped in time, that is, the security risk is Degree of control.
In one embodiment, the server can return the projection screen information for the projection screen terminal to the user equipment when there is no security risk to the user equipment. For example, when the logged-in user of the user equipment and the projection screen terminal belong to the same group, it can be determined that the user equipment does not have a security risk, so that the user equipment can use the returned projection screen information to realize the basis of the projection screen terminal The projection screen operation without the need to connect the user equipment to the local area network where the projection screen terminal is located or created.
Step 406: The server returns the projection screen information for the projection screen terminal to the user equipment according to the second projection screen request initiated by the user equipment and containing the security verification code.
In one embodiment, since the security verification code is displayed on the projection screen terminal, when the second projection screen request initiated by the user equipment includes the security verification code, it indicates that the user equipment and its user are in the projection screen terminal Nearby, otherwise the security verification code cannot be obtained. Therefore, it can be determined that the security risk of the user equipment is eliminated or reduced to a controllable level, and even the random projection of the screen can be detected and stopped in time, so the projection screen information is returned to the user equipment, so that the user The equipment can realize the projection screen accordingly.
In one embodiment, the server may push the validity period corresponding to the security verification code to the projection screen terminal, so that the projection screen terminal displays the security verification code within the validity period, and stops displaying the security verification code after the validity period expires; accordingly; , The server can invalidate the above security verification code after the validity period, so that the projection screen request containing the security verification code received after the validity period cannot be responded to normally (that is, the projection screen information will not be returned). Based on the above-mentioned validity period management, it can be ensured that users located near the projection screen terminal can read the security verification code in time and generate a second projection screen request accordingly, while avoiding the security verification code being used multiple times and increasing security risks.
In one embodiment, after receiving the first projection screen request, the server may record the initiator information (user equipment and/or logged-in user) of the first projection screen request; After the second projection screen request containing the security verification code, the initiator information (user equipment and/or logged-in user) of the second projection screen request can be obtained and compared with the initiator information of the first projection screen request : If they are the same, then return to the projection screen information, otherwise do not return. Accordingly, when user A near the projection screen terminal initiates the first projection screen request, even user B who is also near the projection screen terminal reads the security verification code and provides it to user C who is not near the projection screen terminal. The user C also cannot obtain the projection screen information for the projection screen terminal based on the security verification code, that is, the security verification code displayed at this time is exclusive to the user A, thereby avoiding the risk of the security verification code being stolen.
In an embodiment, the server may count the frequency of pushing the security verification code to the same projection screen terminal, so as to limit the frequency to not greater than the second preset frequency. In other words, when the frequency of pushing the security verification code for a certain projection screen terminal reaches the second preset frequency, the server will stop pushing the security verification code to the projection screen terminal, for example, enter the cooling state for a preset time to avoid targeting The projection screen terminal implements cyber attacks and improves security. Further, after the server receives the first projection screen request initiated by the user equipment used by a user, it causes it to frequently (for example, reach the second preset frequency) to push the security verification code to the projection screen terminal, then the server The device can also extract the user's account information and/or the information of the user equipment (such as IP address, MAC address, etc.) used by the user and add it to the blacklist, so that it cannot continue to attack the above-mentioned projection screen terminal.
In one embodiment, in response to the second projection screen request initiated by the user equipment, the server can return to the user equipment public network projection screen information for the projection screen terminal, so that the user equipment can be based on the public network The projection screen information realizes the public network projection screen, then the user equipment only needs to be connected to the public network and does not need to be in the same local network as the projection screen terminal, and the projection screen can be realized through the projection screen terminal; especially on the user equipment When originally connected to a public network, there is no need to actively switch from a public network to a local area network, which helps simplify user operations. In other embodiments, the server responds to the second projection screen request initiated by the user equipment to return the projection screen information to the user equipment, which can also be used to project the screen through the projection screen terminal in other network environments, such as The private network or private network within the enterprise, etc., in short, the network environment is different from the local network accessed by the projection screen terminal, and the user equipment does not need to switch from the accessed network to the projection screen terminal access The local area network can realize the projection screen.
In one embodiment, after the server has provided the projection screen information to the above-mentioned user equipment, the server may receive a third projection screen request initiated by another device, and the third projection screen request includes a request for the above-mentioned projection screen. The terminal’s device projection screen code, then when the third projection screen information comes from the associated device of the aforementioned user equipment, the server can determine that the status of the associated device is the same as or similar to the aforementioned user equipment, such as the associated device and the user The devices are all near the projection screen terminal, so the server does not need to return a security verification code to the associated device, and can directly return the projection screen information for the projection screen terminal to the associated device.
Among them, when a certain device meets at least one of the following conditions, it can be determined as the associated device of the above-mentioned user equipment: the registered user of the associated device and the registered user of the user equipment have the same community affiliation information, For example, the two belong to the same company; the associated equipment and the user equipment are geographically close. For example, the server can separately obtain the geographical information collected by the two equipment based on the built-in positioning chip, and compare to determine whether the two are similar (for example, the geographical position is not the same). When the distance is greater than the preset distance, it is judged to be similar); the interval between the initiation time of the third projection screen request and the initiation time of the second projection screen request does not exceed the preset time period. At this time, the user of the user device and the associated device may be in In the same conference, the preset duration may be, for example, the conference duration set by the logged-in user of the user equipment. For example, when multiple users in the same company participate in a meeting in the same conference room, after one of the users obtains the projection screen information for the projection screen terminal based on the technical solution of this manual, it can verify that other users and the use If the user is in the same company and the geographic location is close, then when other users initiate the above third projection screen request to the server, if the initiation time of the third projection screen request is close to the initiation time of the second projection screen request (such as interval Within the preset duration), the server can determine that these users are in the same meeting, and can directly return the projection screen information to the other users.
FIG. 5A is a flowchart of another projection screen method on the terminal side of the projection screen provided by an exemplary embodiment. As shown in FIG. 5A, the method is applied to a projection screen terminal (for example, the projection screen terminal 14 shown in FIG. 1), and may include the following steps:
In step 502A, the projection screen terminal displays a device projection screen code, and the device projection screen code uniquely corresponds to the projection screen terminal, so that the user device initiates a first projection screen request including the device projection screen code to the server.
In one embodiment, the server running the mobile corporate office platform, the user equipment and the projection screen terminal run the client terminal of the mobile corporate office platform respectively, so that the server, the user equipment and the projection screen The terminals can realize data interaction and other operations based on the mobile group office platform, so as to realize the projection screen solution of this manual.
In one embodiment, the device projection screen code can be generated by the server and allocated to each projection screen terminal in advance; or, the device projection screen code can be generated locally by the projection screen terminal according to a preset method and uploaded to the server. In short, the server records a one-to-one mapping relationship between each projection screen terminal and the device projection screen code, so that the server can accurately and uniquely determine the corresponding projection screen code based on the device projection screen code included in the first projection screen request Projection screen terminal.
In one embodiment, the projection screen terminal has a display screen that can display the device projection screen code on the display screen, so that the user of the user equipment can view the device projection screen code and input the device projection screen code In the user equipment, the above-mentioned first projection screen request is generated. In addition to being displayed on the display screen, the projection screen terminal can also inform the user of the device projection screen code through other methods, such as voice broadcast, etc. This manual does not limit this. Wherein, the user equipment may display an input interface to the user to project the screen code from the user input device; or the user equipment may collect the input voice of the user and recognize the device projection screen code from the input voice; Alternatively, the user equipment may provide other methods to enable the user to complete the input operation of the device projection screen code.
In one embodiment, the user equipment may maintain a historical record for recording all equipment projection screen codes input by the user. Then, if the user has previously entered the projection screen code of the above device, there is no need to re-enter it. Just look up the projection screen code of the above device in the history record maintained by the user’s device, and then the above first projection screen code can be generated accordingly. Projection screen request.
In step 504A, the projection screen terminal receives a security verification code pushed by a server, and the security verification code is pushed by the server to the projection screen terminal upon receiving the first projection screen request.
In one embodiment, the server always pushes a security verification code to the projection screen terminal in response to the received first projection screen request, so as to verify the security of the user equipment based on the security verification code. By pushing the security verification code to the projection screen terminal for display, only users located near the projection screen terminal can view the security verification code, and initiate the following second projection screen request to avoid not being near the projection screen terminal The illegal user initiates a second projection screen request and obtains projection screen information for the projection screen terminal. For example, when a visitor visits a certain company, the visitor may use and record the device projection screen code of the projection screen terminal in the company. Then, after the visitor leaves the company, he can use the device projection screen code to report to the server at any time. The device initiates the aforementioned first projection screen request, but it cannot obtain the projection screen information for the projection screen terminal because it cannot obtain the security verification code, so that the visitor cannot perform projection on the projection screen terminal regardless of whether it is intentional or unintentional. The screen can prevent it from affecting the normal use of the projection screen terminal by the employees in the enterprise.
In one embodiment, the server can identify whether the user equipment has a security risk through a preset method. For example, the server can determine the user equipment when the user equipment does not meet at least one of the following projection screen conditions There is a security risk: the registered user on the user equipment (equivalent to the user of the user equipment) and the projection screen terminal belong to the same group (groups in this manual can include companies, schools, hospitals, associations, government agencies, etc.) , This manual does not limit this); the logged-in user is not on the projection screen blacklist of the community to which the projection screen terminal belongs; the logged-in user is on the projection screen whitelist of the community to which the projection screen terminal belongs; logged in to use The request frequency of the user (the sending frequency of the first projection screen request) is not greater than the first preset frequency; the network used by the user equipment (such as a public network or other network) is not in the network black of the organization to which the projection screen terminal belongs List; the network used by the user equipment is in the network whitelist of the organization to which the projection screen terminal belongs, etc. This manual does not restrict this. For user equipment with security risks, the server can further verify the security of the user equipment through the security verification code, so as to avoid directly providing the projection screen information for the projection screen terminal to the user equipment when the security is unknown. Prevent unsafe user equipment from projecting screen information based on the public network projection screen at will through the projection screen terminal.
Step 506A, the projection screen terminal displays the security verification code, so that the server, upon receiving a second projection screen request initiated by the user equipment and containing the security verification code, sends the The user equipment returns projection screen information for the projection screen terminal.
In one embodiment, the security verification code is pushed to the projection screen terminal for display, so that only users located near the projection screen terminal can view the security verification code, and initiate the following second projection screen request to avoid An illegal user who is not near the projection screen terminal initiates a second projection screen request and obtains projection screen information for the projection screen terminal. For example, when a visitor visits a certain company, the visitor may use and record the device projection screen code of the projection screen terminal in the company. Then, after the visitor leaves the company, he can use the device projection screen code to report to the server at any time. The device initiates the aforementioned first projection screen request, but it cannot obtain the projection screen information for the projection screen terminal because it cannot obtain the security verification code, so that the visitor cannot perform projection on the projection screen terminal regardless of whether it is intentional or unintentional. The screen can prevent it from affecting the normal use of the projection screen terminal by the employees in the enterprise.
In one embodiment, since the security verification code is displayed on the projection screen terminal, when the second projection screen request initiated by the user equipment includes the security verification code, it indicates that the user equipment and its user are in the projection screen terminal Nearby, otherwise the security verification code cannot be obtained. Therefore, it can be determined that the security risk of the user equipment is eliminated or reduced to a controllable level, and even the random projection of the screen can be detected and stopped in time, so the projection screen information is returned to the user equipment, so that the user The equipment can realize the projection screen accordingly.
In one embodiment, the projection screen terminal may receive the validity period corresponding to the security verification code pushed by the server, and display the security verification code within the validity period, and stop displaying the security verification code after the validity period expires; accordingly, the server The above security verification code can be set to an invalid state after the validity period expires, so that the projection screen request containing the security verification code received after the validity period cannot be responded to normally (that is, the projection screen information will not be returned). Based on the above-mentioned validity period management, it can be ensured that users located near the projection screen terminal can read the security verification code in time and generate a second projection screen request accordingly, while avoiding the security verification code being used multiple times and increasing security risks.
In one embodiment, after receiving the first projection screen request, the server may record the initiator information (user equipment and/or logged-in user) of the first projection screen request; After the second projection screen request containing the security verification code, the initiator information (user equipment and/or logged-in user) of the second projection screen request can be obtained and compared with the initiator information of the first projection screen request : If they are the same, then return to the projection screen information, otherwise do not return. Accordingly, when user A near the projection screen terminal initiates the first projection screen request, even user B who is also near the projection screen terminal reads the security verification code and provides it to user C who is not near the projection screen terminal. The user C also cannot obtain the projection screen information for the projection screen terminal based on the security verification code, that is, the security verification code displayed at this time is exclusive to the user A, thereby avoiding the risk of the security verification code being stolen.
In an embodiment, the frequency of pushing the security verification code to the same projection screen terminal may be limited by the server to not be greater than the second preset frequency. In other words, when the frequency of pushing the security verification code for a certain projection screen terminal reaches the second preset frequency, the server will stop pushing the security verification code to the projection screen terminal, for example, enter the cooling state for a preset time to avoid targeting The projection screen terminal implements cyber attacks and improves security. Further, after the server receives the first projection screen request initiated by the user equipment used by a user, it causes it to frequently (for example, reach the second preset frequency) to push the security verification code to the projection screen terminal, then the server The device can also extract the user's account information and/or the information of the user equipment (such as IP address, MAC address, etc.) used by the user and add it to the blacklist, so that it cannot continue to attack the above-mentioned projection screen terminal.
In one embodiment, in response to the second projection screen request initiated by the user equipment, the server can return to the user equipment public network projection screen information for the projection screen terminal, so that the user equipment can be based on the public network The projection screen information realizes the public network projection screen, then the user equipment only needs to be connected to the public network and does not need to be in the same local network as the projection screen terminal, and the projection screen can be realized through the projection screen terminal; especially on the user equipment When originally connected to a public network, there is no need to actively switch from a public network to a local area network, which helps simplify user operations. In other embodiments, the server responds to the second projection screen request initiated by the user equipment to return the projection screen information to the user equipment, which can also be used to project the screen through the projection screen terminal in other network environments, such as The private network or private network within the enterprise, etc., in short, the network environment is different from the local network accessed by the projection screen terminal, and the user equipment does not need to switch from the accessed network to the projection screen terminal access The local area network can realize the projection screen.
FIG. 5B is a flowchart of a method for projecting a screen on a user equipment side according to an exemplary embodiment. As shown in FIG. 5B, the method is applied to a user equipment (for example, the user equipment 13 shown in FIG. 1), and may include the following steps:
In step 502B, the user equipment initiates a first projection screen request including the device projection screen code to the server according to the device projection screen code displayed by the projection screen terminal, so that the server determines based on the device projection screen code The projection screen terminal, and push a security verification code to the projection screen terminal.
In one embodiment, the server running the mobile corporate office platform, the user equipment and the projection screen terminal run the client terminal of the mobile corporate office platform respectively, so that the server, the user equipment and the projection screen The terminals can realize data interaction and other operations based on the mobile group office platform, so as to realize the projection screen solution of this manual.
In one embodiment, the device projection screen code can be generated by the server and allocated to each projection screen terminal in advance; or, the device projection screen code can be generated locally by the projection screen terminal according to a preset method and uploaded to the server. In short, the server records a one-to-one mapping relationship between each projection screen terminal and the device projection screen code, so that the server can accurately and uniquely determine the corresponding projection screen code based on the device projection screen code included in the first projection screen request Projection screen terminal.
In one embodiment, the projection screen terminal has a display screen that can display the device projection screen code on the display screen, so that the user of the user equipment can view the device projection screen code and input the device projection screen code In the user equipment, the above-mentioned first projection screen request is generated. In addition to being displayed on the display screen, the projection screen terminal can also inform the user of the device projection screen code through other methods, such as voice broadcast, etc. This manual does not limit this. Wherein, the user equipment may display an input interface to the user to project the screen code from the user input device; or the user equipment may collect the input voice of the user and recognize the device projection screen code from the input voice; Alternatively, the user equipment may provide other methods to enable the user to complete the input operation of the device projection screen code.
Among them, when the projection screen terminal displays the device projection screen code, the user device can obtain the device projection screen code in the following way: when the device projection screen code is displayed as a two-dimensional bar code, the user device can use Recognize the two-dimensional barcode to obtain the device projection screen code; or, in the case that the device projection screen code is displayed as a string, the user device can collect and recognize the string to obtain the device projection screen code; or, use The user device can display an input interface, and obtain the device projection screen code from the user input information received by the input interface.
In one embodiment, the user equipment may maintain a historical record for recording all equipment projection screen codes input by the user. Then, if the user has previously entered the projection screen code of the above device, there is no need to re-enter it. Just look up the projection screen code of the above device in the history record maintained by the user’s device, and then the above first projection screen code can be generated accordingly. Projection screen request.
In one embodiment, the server always pushes a security verification code to the projection screen terminal in response to the received first projection screen request, so as to verify the security of the user equipment based on the security verification code. By pushing the security verification code to the projection screen terminal for display, only users located near the projection screen terminal can view the security verification code, and initiate the following second projection screen request to avoid not being near the projection screen terminal The illegal user initiates a second projection screen request and obtains projection screen information for the projection screen terminal. For example, when a visitor visits a certain company, the visitor may use and record the device projection screen code of the projection screen terminal in the company. Then, after the visitor leaves the company, he can use the device projection screen code to report to the server at any time. The device initiates the aforementioned first projection screen request, but it cannot obtain the projection screen information for the projection screen terminal because it cannot obtain the security verification code, so that the visitor cannot perform projection on the projection screen terminal regardless of whether it is intentional or unintentional. The screen can prevent it from affecting the normal use of the projection screen terminal by the employees in the enterprise.
In one embodiment, the server can identify whether the user equipment has a security risk through a preset method, so that the security verification code is only pushed to the projection screen terminal when the user equipment has a security risk, and there is no security risk. There is no need to push the security verification code. For example, the server can determine that the user equipment has a security risk when the user equipment does not meet at least one of the following projection screen conditions: the logged-in user on the user equipment (equivalent to the use of the user equipment It belongs to the same group as the projection screen terminal (groups in this manual can include companies, schools, hospitals, societies, government agencies, etc. This manual does not restrict this); the logged-in user is not in the group to which the projection screen terminal belongs The blacklist of the projection screen; the logged-in user is in the whitelist of the projection screen of the group to which the projection screen terminal belongs; the request frequency of the logged-in user (the sending frequency of the first projection screen request) is not greater than the first preset frequency ; The network used by the user equipment (such as a public network or other network) is not in the network blacklist of the group to which the projection screen terminal belongs; the network used by the user equipment is in the network white list of the group to which the projection screen terminal belongs, etc. , This manual does not limit this. For user equipment with security risks, the server can further verify the security of the user equipment through the security verification code, so as to avoid directly providing the projection screen information for the projection screen terminal to the user equipment when the security is unknown. Prevent unsafe user equipment from randomly implementing a projection screen through the projection screen terminal based on the projection screen information.
In one embodiment, the server may return the local network projection screen information for the projection screen terminal to the user equipment when it determines that the user equipment has a security risk. At this time, if the user equipment is added to the local area network where the projection screen terminal is located or the local area network created by the projection screen terminal, then the user equipment can use the above-mentioned local network projection screen information to realize based on the projection screen terminal Projection screen operation; among them, due to the limited coverage area of the local network, the user equipment and its users must be located near the projection screen terminal. Even if the random projection screen occurs, it can be detected and stopped in time, that is, the security risk is Degree of control.
In one embodiment, the server can return the projection screen information for the projection screen terminal to the user equipment when there is no security risk to the user equipment. For example, when the logged-in user of the user equipment and the projection screen terminal belong to the same group, it can be determined that the user equipment does not have a security risk, so that the user equipment can use the returned projection screen information to realize the basis of the projection screen terminal The projection screen operation without the need to connect the user equipment to the local area network where the projection screen terminal is located or created.
In step 504B, the user equipment initiates a second projection screen request including the security verification code to the server according to the security verification code displayed on the projection screen terminal.
Step 506B, the user equipment receives projection screen information for the projection screen terminal returned by the server, and the projection screen information is returned by the server in response to the second projection screen request.
In one embodiment, since the security verification code is displayed on the projection screen terminal, when the second projection screen request initiated by the user equipment includes the security verification code, it indicates that the user equipment and its user are in the projection screen terminal Nearby, otherwise the security verification code cannot be obtained. Therefore, it can be determined that the security risk of the user equipment is eliminated or reduced to a controllable level, and even the random projection of the screen can be detected and stopped in time, so the projection screen information is returned to the user equipment, so that the user The equipment can realize the projection screen accordingly.
Similar to the above-mentioned device projection screen code, when the projection screen terminal displays the security verification code, the user device can obtain the security verification code in the following way: when the security verification code is displayed as a two-dimensional barcode , The user equipment can obtain the security verification code by recognizing the two-dimensional barcode; or, in the case that the security verification code is displayed as a string, the user equipment can obtain the security verification code by collecting and recognizing the string; Alternatively, the user equipment may display an input interface, and obtain the security verification code from the user input information received by the input interface.
In one embodiment, the server may push the validity period corresponding to the security verification code to the projection screen terminal, so that the projection screen terminal displays the security verification code within the validity period, and stops displaying the security verification code after the validity period expires; accordingly; , The server can invalidate the above security verification code after the validity period, so that the projection screen request containing the security verification code received after the validity period cannot be responded to normally (that is, the projection screen information will not be returned). Based on the above-mentioned validity period management, it can be ensured that users located near the projection screen terminal can read the security verification code in time and generate a second projection screen request accordingly, while avoiding the security verification code being used multiple times and increasing security risks.
In one embodiment, after receiving the first projection screen request, the server may record the initiator information (user equipment and/or logged-in user) of the first projection screen request; After the second projection screen request containing the security verification code, the initiator information (user equipment and/or logged-in user) of the second projection screen request can be obtained and compared with the initiator information of the first projection screen request : If they are the same, then return to the projection screen information, otherwise do not return. Accordingly, when user A near the projection screen terminal initiates the first projection screen request, even user B who is also near the projection screen terminal reads the security verification code and provides it to user C who is not near the projection screen terminal. The user C also cannot obtain the projection screen information for the projection screen terminal based on the security verification code, that is, the security verification code displayed at this time is exclusive to the user A, thereby avoiding the risk of the security verification code being stolen.
In an embodiment, the server may count the frequency of pushing the security verification code to the same projection screen terminal, so as to limit the frequency to not greater than the second preset frequency. In other words, when the frequency of pushing the security verification code for a certain projection screen terminal reaches the second preset frequency, the server will stop pushing the security verification code to the projection screen terminal, for example, enter the cooling state for a preset time to avoid targeting The projection screen terminal implements cyber attacks and improves security. Further, after the server receives the first projection screen request initiated by the user equipment used by a user, it causes it to frequently (for example, reach the second preset frequency) to push the security verification code to the projection screen terminal, then the server The device can also extract the user's account information and/or the information of the user equipment (such as IP address, MAC address, etc.) used by the user and add it to the blacklist, so that it cannot continue to attack the above-mentioned projection screen terminal.
In one embodiment, in response to the second projection screen request initiated by the user equipment, the server can return to the user equipment public network projection screen information for the projection screen terminal, so that the user equipment can be based on the public network The projection screen information realizes the public network projection screen, then the user equipment only needs to be connected to the public network and does not need to be in the same local network as the projection screen terminal, and the projection screen can be realized through the projection screen terminal; especially on the user equipment When originally connected to a public network, there is no need to actively switch from a public network to a local area network, which helps simplify user operations. In other embodiments, the server responds to the second projection screen request initiated by the user equipment to return the projection screen information to the user equipment, which can also be used to project the screen through the projection screen terminal in other network environments, such as The private network or private network within the enterprise, etc., in short, the network environment is different from the local network accessed by the projection screen terminal, and the user equipment does not need to switch from the accessed network to the projection screen terminal access The local area network can realize the projection screen.
Assuming that the user equipment used by the user Ua is a notebook computer, and the projection screen terminal can specifically adopt the product form of a projection screen box, the user Ua can try to establish a network connection between the notebook computer and the projection screen box. Project the display content on the laptop to the TV screen connected to the projection screen box. Taking the instant messaging application T as an example, the client 1 of the instant messaging application T can be run on the laptop 1, the client 2 of the instant messaging application T can be run on the projection screen box, and the instant messaging application can be run on the server The server end of T allows the notebook computer, the projection screen box and the server to realize data interaction based on the instant messaging application T, which is described below with reference to FIG. 6. Among them, FIG. 6 is an interactive schematic diagram for implementing a public network projection screen provided by an exemplary embodiment. As shown in Figure 6, the interaction process between the notebook computer, the projection screen box and the server can include the following steps:
In step 601, the server allocates a projection screen code to the projection screen box.
In one embodiment, the server may generate the projection screen code according to a preset method, and establish a correspondence between the projection screen box and the projection screen code by assigning the projection screen code to the projection screen box. Since the projection screen codes corresponding to all projection screen boxes are generated and distributed by the server, the server can ensure that the projection screen codes corresponding to each projection screen box are different from each other, thereby establishing a gap between the projection screen box and the projection screen code. A corresponding mapping relationship, and the mapping relationship is maintained at the server.
Step 602, the projection screen box displays the assigned projection screen code.
In one embodiment, the projection screen box may be provided with a display screen, so that the projection screen box can display the assigned projection screen code on the display screen. Or, the projection screen box can display the assigned projection screen code on the connected TV or other display device. For example, as shown in Figure 7, in the projection screen information display interface 700 formed by the projection screen box, relevant prompt information can be displayed in the display area 71 to instruct the user to perform operations such as wireless projection screen, conference room reservation, scan code projection screen, etc. , And information such as the projected screen code and the name of the local network WiFi can be shown in the display area 721. For example, the projected screen code in FIG. 7 is 32562. In addition, the projection screen information display interface 700 may also include other information, such as the name of the meeting room and reservation information in the display area 722, and the two-dimensional bar code for scanning the projection screen in the display area 723.
Of course, in addition to the display method, the projection screen box can also provide the projection screen code to the user Ua in other ways, such as voice broadcast, etc. This manual does not limit this.
In step 603, the notebook computer uploads the inputted projection screen code to the server.
In one embodiment, the notebook computer can receive the projection screen code input by the user Ua and upload it to the server. For example, the notebook computer may initiate a first projection screen request to the server, and carry the projection screen code input by the user Ua in the first projection screen request.
In one embodiment, the notebook computer can display an interface so that the user Ua can input the projection screen code into the interface; or, the notebook computer can collect the user Ua's voice and recognize the projection from the user Ua's voice The screen code can also enable the user Ua to complete the input of the projection screen code; or, the notebook computer can collect the projection screen code of the projection screen box under the trigger of the user Ua to broadcast the voice, and broadcast the voice from the projection screen code Recognizing the projection screen code is equivalent to the user Ua completing the input of the projection screen code. Similarly, the user Ua can also enter the verification code through other methods, which will not be repeated here.
Step 604: The server determines the corresponding projection screen box according to the received projection screen code.
In one embodiment, the server can determine the projection screen box corresponding to the received projection screen code (uploaded by the user Ua) based on the mapping relationship maintained on the server as described above.
In step 605, the server determines the group ownership of the user Ua and the projection screen box.
In an embodiment, it is assumed that the user Ua and the projection screen box respectively have corresponding group memberships. The server maintains the organizational structure information of each group (including the information of the members of the group and the information of the smart devices such as the projection screen box bound to the group), so that the server can know the user Ua and the above-mentioned projection screen box. The affiliation of the group.
Assume that the user Ua is an employee of the enterprise AA, and the projection screen box is bound to the smart device of the enterprise AA, so that the server can determine that the user Ua is consistent with the group attribution information of the projection screen box; assume that the user Ua is Employees of enterprise AA, and the projection screen box is bound to the smart device of enterprise BB, so that the server can determine that the user Ua is inconsistent with the group attribution information of the projection screen box.
When the group attribution information of the user Ua and the projection screen box are consistent, the probability of the user Ua performing unsafe operations on the projection screen box is relatively low, and the server can determine that the user Ua has high security; and, when the user Ua When the group attribution information of the projection screen box is inconsistent, that is, the user Ua is a visitor to the projection screen box, and the probability of user Ua performing unsafe operations on the projection screen box is relatively high, and the server can determine that user Ua has Low security.
Of course, the server can also make a security judgment on the user Ua based on other dimensions. Here, only the group attribution information is taken as an example.
In step 606a, when the user Ua has high security, the server returns the public network projection screen information to the notebook computer.
In one embodiment, the public network projection screen information may include the information for establishing a network connection between the notebook computer and the above projection screen box to realize the public network projection screen, such as the device UID, etc. This manual does not limit this . In short, based on the public network projection screen information provided by the server, the notebook computer and the projection screen box do not need to be in the same local network, and the network connection can be realized through the public network, and the notebook computer can be projected through The screen box is used for projecting the screen, and the screen display content on the notebook computer is synchronously displayed on the TV screen connected to the projection screen box.
In step 606b, when the user Ua has low security, the server issues a verification code to the projection screen box.
In one embodiment, the verification code issued by the server is random, so that the verification code cannot be guessed or generated by analogy, and has high security.
In step 606c, when the user Ua has low security, the server can also return the LAN projection screen information to the notebook computer.
In one embodiment, if the user Ua is indeed near the projection screen box, and the notebook computer and the projection screen box are connected to the same local network, then the notebook computer can project the screen information to the projection screen box based on the local network Projection screen.
Step 607, the projection screen box displays the received verification code.
In one embodiment, the projection screen information display interface 700 as shown in FIG. 7 may further include a verification code display area 73, and the projection screen box may display the verification code in the verification code display area 73, for example, as shown in FIG. The verification code in 7 is 5839.
In one embodiment, when the user Ua is a visitor, the security risk that the user Ua may have is that the user Ua may not be near the projection screen box, for example, the user Ua may have visited the company BB. And entered the projection screen code of the projection screen box, so that the user Ua performed the above step 603 due to a wrong operation (such as selecting the wrong history record), or the user Ua may perform the above step 603 maliciously. In short, if the server The device directly provides the public network projection screen information to the user Ua, then the user Ua may randomly project the screen to the projection screen box through the public network, thereby causing interference within the enterprise BB. Therefore, through the secondary verification process based on the verification code, only the user located near the projection screen box can learn the content of the verification code, so when the user Ua is not near the projection screen box, the secondary verification cannot be completed. Unable to obtain public network projection screen information to prevent user Ua from causing interference to the corporate BB. When user Ua is indeed near the projection screen box, public network projection screen information can be obtained smoothly to ensure that user Ua can perform projection smoothly Screen operation.
In step 608, the notebook computer uploads the entered verification code to the server.
In one embodiment, the process of inputting the verification code by the user Ua and the process of uploading the verification code to the server by the notebook computer can refer to the relevant operation for projecting the screen code in step 603, which will not be repeated here.
In step 609, the server verifies the uploaded content.
In one embodiment, the server verifies whether the received verification code is the same as the verification code issued to the projection screen box, if they are the same, it means that the verification is passed, otherwise the verification is not passed.
In one embodiment, the server may set a validity period for the verification code, for example, it is valid within 60 seconds from the time the verification code is issued; then, when the content of the verification code is the same and the receiving time is within the validity period, the server determines that the verification is passed, Otherwise, the verification fails.
In one embodiment, when the server issues the verification code based on the request of the user Ua, the server can further identify whether the received verification code was uploaded by the user Ua, and if it is not uploaded by the user Ua, the verification fails; If uploaded by the user Ua and the content of the verification code is the same (the validity period mentioned above can also be further combined), the server determines that the verification is passed.
In step 610, the server returns the public network projection screen information to the notebook computer, so that the notebook computer performs the public network projection screen to the projection screen box.
In an embodiment, reference may be made to the aforementioned step 606a, which will not be repeated here.
In the embodiment of this specification, when the user equipment initiates a first projection screen request containing the device projection screen code to the server, the server can determine the corresponding projection screen terminal based on the device projection screen code, and can send the The projection screen terminal sends a security verification code to verify whether the user equipment is near the projection screen terminal, so as to avoid providing projection screen information for the projection screen terminal to the remote user equipment to prevent security problems.
Assuming that the user of the user equipment is in a conference room in a certain place, the user can implement a local projection screen through the projection screen terminal in the conference room. And if the participants in the meeting also include other people in the conference room in other places, then the user can also use the user equipment to project the screen on the projection screen terminal of the conference room in the other place. At this time, the participants in the conference room can get the local projection. The device projection screen code on the screen terminal informs the above-mentioned user that the user initiates a projection screen request (equivalent to the first projection screen request) containing the projection screen code of the device to the server, and the server After the projection screen terminal sends the security verification code, participants in the conference room in other places can also obtain the security verification code on the local projection screen terminal, and inform the above-mentioned user, so that the user can initiate a security verification code containing the security verification code to the server. The projection screen request (equivalent to the second projection screen request), and then obtain the projection screen information for the projection screen terminal of the foreign conference room. Then, the user can respectively project the screen to the local and foreign projection screen terminals through the same user equipment, which is convenient for the smooth progress of the remote conference.
In some scenarios, when the security verification code is sent to the projection screen device, the security verification code may be easily leaked. Therefore, the server can send the security verification code to a specific object, so that only the specific object can obtain the security verification code; for example, it can be pushed to a mobile phone used by a specific user other than the initiator of the first projection screen request, etc. On the user equipment, the specific user decides whether to forward the request to the initiator of the first projection screen. For example, in a family scenario, when a minor initiates a first projection screen request, by sending a security verification code to the parent's mobile phone, the parent can reasonably control and manage the minor's projection screen operation. For another example, in a large conference scenario, when the speaker initiates the first projection screen request, by sending the security verification code to the mobile phone of the conference organizer or host, the security verification code can be prevented from being obtained by non-speakers, ensuring that only speaking The person can implement the projection screen. Similarly, by reasonably sending the security verification code, the exposure range of the security verification code can be restricted to improve security.
Further, the number of the above-mentioned specific objects may be multiple. In order to ensure that each specific object does not project the screen at the same time and cause conflicts, the sending time of the security verification code can be controlled, and the time when each specific object obtains the security verification code can be staggered. For example, when there are multiple speakers in a conference, you can follow the pre-appointed conference process to provide a security verification code to the speaker when the speaking time corresponding to a speaker arrives or is about to arrive, so as to avoid speaking later The person who projects the screen in advance interferes with the previous speaker.
In addition to the implementation based on the security verification code, other methods can also be used to verify whether the user equipment is near the projection screen terminal. For example, when both the user equipment and the projection screen terminal support the NFC function, the user can bring the user equipment close to or touch the projection screen terminal, so that the projection screen terminal can obtain the user equipment or its logged-in user's information based on NFC. Information and provide it to the server; and when the server determines that the user device interacting with the projection screen terminal through NFC is the initiator of the first projection screen request, it can return the projection screen information to the initiator of the first projection screen request . For another example, the user can emit sound near the projection screen terminal, and after the projection screen terminal collects the audio data, it can extract the voiceprint features locally and upload it to the server, or upload the audio data to the server and then the server The voiceprint feature is extracted, and the server can determine the user’s identity information based on the voiceprint feature: if the user’s identity is the same as the initiator of the first projection screen request, then the initiator of the first projection screen request is located Near the projection screen terminal, the server can return projection screen information to the initiator of the first projection screen request.
For the application scenario of the projection screen in the meeting room, you can combine the reservation information of the meeting room to control the operation of the projection screen of the participants. For example, the server can obtain reservation information for each conference room. The reservation information can include the usage time of the conference room, participants, etc., so that the participant can initiate a projection screen for the conference room to the server during the reserved conference room usage time. When the terminal’s first projection screen request (including the device projection screen code corresponding to the projection screen terminal), the server can directly return the projection screen information for the projection screen terminal; and for the temporary participants not included in the reservation information, if The same is to initiate the first projection screen request for the projection screen terminal in the above conference room, then the server can send a security verification code to the projection screen terminal based on the technical solution in this manual, so that temporary participants can initiate the security verification again. When the second projection screen of the code is requested, the server will return the projection screen information to the temporary participants.
For the application scenario of the projection screen in the conference room, the conference room reservation information and verification operation can be combined to control the projection screen operation of the participants. For example, the server can obtain reservation information for each meeting room. The reservation information can include the usage time of the meeting room, participants, etc., so that the server can issue security verification codes to the user devices of the participants in advance (such as reservation It can be issued after success), and the user device of the participant can initiate a projection screen request containing the security verification code to the server, so that the server can mark the initiator of the projection screen request (that is, the above-mentioned participant) Is verified. Then, when participants go to the reserved conference room to participate in the conference, they can initiate a first projection screen request for the projection screen terminal in the conference room (including the projection screen code of the device corresponding to the projection screen terminal) to the server, and the server When it is determined that the initiator of the first projection screen request is marked as verified, the projection screen information for the projection screen terminal can be directly returned, so that the verification operation is implemented in advance, which simplifies the process of actual projection of the screen. operating. When the server marks a participant as verified, it can be time-effective, for example, it is only valid during the meeting time period indicated in the reservation information, and the meeting time period is exceeded (the meeting time period is not reached, or the meeting When the time period has ended), it is marked as failed verification, so as to avoid affecting users who use the voting terminal in other time periods. Of course, for temporary participants not included in the reservation information (or participants who are included in the reservation information but have not been verified in advance), if the first projection screen request (including the The device projection screen code of the projection screen terminal), then the server can send a security verification code to the projection screen terminal based on the technical solution in this manual, so that temporary participants (or unverified participants) can re-initiate the inclusion of the When the second projection screen of the security verification code is requested, the server will return the projection screen information to the temporary participants (or unverified participants).
Fig. 8 is a schematic structural diagram of a device provided by an exemplary embodiment. Please refer to Figure 8. At the hardware level, the device includes a processor 802, an internal bus 804, a network interface 806, an internal memory 808, and a non-volatile memory 810. Of course, it may also include hardware required for other services. . The processor 802 reads the corresponding computer program from the non-volatile memory 810 to the internal memory 808 and then runs it to form a projection screen device on a logical level. Of course, in addition to software implementation, one or more embodiments of this specification do not exclude other implementations, such as logic devices or a combination of software and hardware, etc., which means that the execution body of the following processing flow is not limited Each logical unit can also be a hardware or a logical device.
Please refer to FIG. 9, in the software implementation, the projection screen device may include:
The determining unit 91 enables the server to determine the projection screen terminal corresponding to the device projection screen code included in the first projection screen request according to the first projection screen request initiated by the user equipment;
The first pushing unit 92 enables the server to push a security verification code to the projection screen terminal when the user equipment has a security risk, so that the projection screen terminal displays the security verification code ；
The first returning unit 93 enables the server to return the projection screen information for the projection screen terminal to the user equipment according to the second projection screen request initiated by the user equipment and containing the security verification code.
Optionally, the device projection screen code is generated by the projection screen terminal; or, the device projection screen code is pre-assigned to the projection screen terminal by the server.
Optionally, the server determines that the user equipment has a security risk when the user equipment does not meet at least one of the following projection screen conditions:
The logged-in user on the user equipment and the projection screen terminal belong to the same group;
The logged-in user is not in the projection screen blacklist of the community to which the projection screen terminal belongs;
The logged-in user is in the projection screen whitelist of the community to which the projection screen terminal belongs;
The request frequency of the logged-in user is not greater than the first preset frequency;
The network used by the user equipment is not in the network blacklist of the group to which the projection screen terminal belongs;
The network used by the user equipment is in the network whitelist of the community to which the projection screen terminal belongs.
Optionally, it also includes:
The second returning unit 94 enables the server to return the local network projection screen information for the projection screen terminal to the user equipment when the user equipment has a security risk.
Optionally, it also includes:
The statistics unit 95 causes the server to count the frequency of pushing the security verification code to the same projection screen terminal, so as to limit the frequency to not greater than the second preset frequency.
Optionally, it also includes:
The third returning unit 96 enables the server to return the projection screen information for the projection screen terminal to the user equipment when the user equipment does not have a security risk.
Optionally, it also includes:
The second pushing unit 97, the server pushes the validity period corresponding to the security verification code to the projection screen terminal, so that the projection screen terminal displays the security verification code within the validity period.
Optionally, the projection screen information includes public network projection screen information.
Optionally, it also includes:
The receiving unit 98 enables the server to receive a third projection screen request, the third projection screen request comes from an associated device of the user equipment, and the third projection screen request includes a terminal corresponding to the projection screen The device projection screen code;
The fourth returning unit 99 enables the server to return projection screen information for the projection screen terminal to the associated device.
Optionally, the associated device satisfies at least one of the following conditions:
The community attribution information of the logged-in user of the associated device and the logged-in user of the user device are consistent;
The geographical location of the associated equipment and the user equipment are similar;
The interval between the initiation time of the third projection screen request and the initiation time of the second projection screen request does not exceed a preset duration.
Fig. 10 is a schematic structural diagram of a device provided by an exemplary embodiment. Please refer to Figure 10, at the hardware level, the device includes a processor 1002, an internal bus 1004, a network interface 1006, an internal memory 1008, and a non-volatile memory 1010. Of course, it may also include hardware required for other services. . The processor 1002 reads the corresponding computer program from the non-volatile memory 1010 to the internal memory 1008 and then runs it to form a projection screen device on a logical level. Of course, in addition to software implementation, one or more embodiments of this specification do not exclude other implementations, such as logic devices or a combination of software and hardware, etc., which means that the execution body of the following processing flow is not limited Each logical unit can also be a hardware or a logical device.
Please refer to FIG. 11, in the software implementation, the projection screen device may include:
The determining unit 1101 enables the server to determine the projection screen terminal corresponding to the device projection screen code included in the first projection screen request according to the first projection screen request initiated by the user equipment;
The pushing unit 1102 is configured to enable the server to push a security verification code to the projection screen terminal, so that the projection screen terminal displays the security verification code;
The returning unit 1103 enables the server to return the projection screen information for the projection screen terminal to the user equipment according to the second projection screen request initiated by the user equipment and containing the security verification code.
Fig. 12 is a schematic structural diagram of a device provided by an exemplary embodiment. Please refer to Figure 12, at the hardware level, the device includes a processor 1202, an internal bus 1204, a network interface 1206, an internal memory 1208, and a non-volatile memory 1210. Of course, it may also include hardware required for other services. . The processor 1202 reads the corresponding computer program from the non-volatile memory 1210 to the internal memory 1208 and then runs it to form a projection screen device on a logical level. Of course, in addition to software implementation, one or more embodiments of this specification do not exclude other implementations, such as logic devices or a combination of software and hardware, etc., which means that the execution body of the following processing flow is not limited Each logical unit can also be a hardware or a logical device.
Please refer to FIG. 13, in the software implementation, the projection screen device may include:
The projection screen code display unit 1301 causes the projection screen terminal to display the device projection screen code, and the device projection screen code uniquely corresponds to the projection screen terminal, so that the user device initiates a second containing the device projection screen code to the server A request for projection screen;
The receiving unit 1302 enables the projection screen terminal to receive a security verification code pushed by a server, and the security verification code is used by the server when the server receives the first projection screen request and determines that the user equipment has a security risk Push to the projection screen terminal in case;
The verification code display unit 1303 enables the projection screen terminal to display the security verification code, so that the server receives a second projection screen request initiated by the user equipment and containing the security verification code , To return the projection screen information for the projection screen terminal to the user equipment.
Fig. 14 is a schematic structural diagram of a device provided by an exemplary embodiment. Please refer to Figure 14. At the hardware level, the device includes a processor 1402, an internal bus 1404, a network interface 1406, an internal memory 1408, and a non-volatile memory 1410. Of course, it may also include hardware required for other services. . The processor 1402 reads the corresponding computer program from the non-volatile memory 1410 to the internal memory 1408 and then runs it to form a projection screen device on a logical level. Of course, in addition to software implementation, one or more embodiments of this specification do not exclude other implementations, such as logic devices or a combination of software and hardware, etc., which means that the execution body of the following processing flow is not limited Each logical unit can also be a hardware or a logical device.
Please refer to FIG. 15. In the software implementation, the projection screen device may include:
The projection screen code display unit 1501 causes the projection screen terminal to display the device projection screen code, the device projection screen code uniquely corresponding to the projection screen terminal, so that the user device initiates a second containing the device projection screen code to the server A request for projection screen;
The receiving unit 1502 enables the projection screen terminal to receive a security verification code pushed by a server, and the security verification code is pushed by the server to the projection screen terminal upon receiving the first projection screen request;
The verification code display unit 1503 causes the projection screen terminal to display the security verification code, so that the server receives a second projection screen request initiated by the user equipment and containing the security verification code , To return the projection screen information for the projection screen terminal to the user equipment.
Fig. 16 is a schematic structural diagram of a device provided by an exemplary embodiment. Please refer to Figure 16. At the hardware level, the device includes a processor 1602, an internal bus 1604, a network interface 1606, an internal memory 1608, and a non-volatile memory 1610. Of course, it may also include hardware required for other services. . The processor 1602 reads the corresponding computer program from the non-volatile memory 1610 to the internal memory 1608 and then runs it to form a projection screen device on a logical level. Of course, in addition to software implementation, one or more embodiments of this specification do not exclude other implementations, such as logic devices or a combination of software and hardware, etc., which means that the execution body of the following processing flow is not limited Each logical unit can also be a hardware or a logical device.
Please refer to FIG. 17, in the software implementation, the projection screen device may include:
The first request unit 1701 enables the user equipment to initiate a first projection screen request containing the device projection screen code to the server according to the device projection screen code displayed on the projection screen terminal, so that the server can project the device based on the device projection screen code. The screen code determines the projection screen terminal, and pushes a security verification code to the projection screen terminal;
The second request unit 1702 enables the user equipment to initiate a second projection screen request including the security verification code to the server according to the security verification code displayed on the projection screen terminal;
The receiving unit 1703 enables the user equipment to receive projection screen information for the projection screen terminal returned by the server, and the projection screen information is returned by the server in response to the second projection screen request.
Optionally, the first request unit 1701 obtains the device projection screen code in the following manner:
In the case that the device projection screen code is displayed as a two-dimensional bar code, enabling the user device to obtain the device projection screen code by recognizing the two-dimensional bar code; or,
In the case that the device projection screen code is displayed as a string, the user device is allowed to collect and recognize the string to obtain the device projection screen code; or,
The user equipment is caused to display an input interface, and the equipment projection screen code is obtained from the user input information received by the input interface.
Optionally, the second request unit 1702 obtains the security verification code in the following manner:
In the case that the security verification code is displayed as a two-dimensional barcode, enabling the user equipment to obtain the security verification code by recognizing the two-dimensional barcode; or,
In the case that the security verification code is displayed as a string, the user equipment is allowed to collect and recognize the string to obtain the security verification code; or,
The user equipment is caused to display an input interface, and the security verification code is obtained from the user input information received by the input interface.
The systems, devices, modules, or units explained in the above embodiments may be implemented by computer chips or entities, or implemented by products with certain functions. A typical implementation device is a computer. The specific form of the computer can be a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email receiving and sending device, and a game. Host, tablet, wearable device, or a combination of any of these devices.
In a typical configuration, a computer includes one or more processors (CPUs), input/output interfaces, network interfaces, and internal memory.
Internal memory may include non-permanent memory in computer-readable media, random access memory (RAM) and/or non-volatile internal memory, such as read-only memory (ROM) or flash memory (flash RAM). Internal memory is an example of computer-readable media.
Computer-readable media include permanent and non-permanent, removable and non-removable media, and information storage can be realized by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), and other types of random access memory (RAM) , Read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other internal memory technology, CD-ROM, digital multi-function Optical disc (DVD) or other optical storage, magnetic cassette tape, magnetic disk storage, quantum memory, graphene-based storage media or other magnetic storage devices or any other non-transmission media that can be used for storage and can be stored by computing devices Fetched information. According to the definition in this article, computer-readable media does not include transitory media, such as modulated data signals and carrier waves.
It should also be noted that the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or equipment including a series of elements not only includes those elements, but also includes Other elements that are not explicitly listed, or they also include elements inherent to such processes, methods, commodities, or equipment. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, commodity, or equipment that includes the element.
The foregoing describes specific embodiments of this specification. Other embodiments are within the scope of the attached patent application. In some cases, the actions or steps described in the scope of the patent application may be performed in a different order from the embodiment and still achieve desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or sequential order shown in order to achieve the desired results. In some embodiments, multiplexing and parallel processing are also possible or may be advantageous.
The terms used in one or more embodiments of this specification are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of this specification. The singular forms of "a", "said" and "the" used in one or more embodiments of this specification and the scope of the appended patent application are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and/or" as used herein refers to and includes any or all possible combinations of one or more associated listed items.
It should be understood that although the terms first, second, third, etc. may be used to describe various information in one or more embodiments of this specification, the information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of this specification, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information. Depending on the context, the word "if" as used herein can be interpreted as "when" or "when" or "in response to certainty".
The foregoing descriptions are only preferred embodiments of one or more embodiments of this specification, and are not intended to limit one or more embodiments of this specification. All within the spirit and principle of one or more embodiments of this specification, Any modification, equivalent replacement, improvement, etc. made should be included in the protection scope of one or more embodiments of this specification.
