515950 A7 B7 五、發明説明（1 ) 技術領域 (請先閱讀背面之注意事項再填寫本頁) 本發明係關於只有對於正當之權利者許可音頻資料或 視頻資料等之內容資料之再生之技術，特別是關於適合於 可以再生大量之內容資料之安置型之內容再生裝置。 背景技術 近年來，嘗試透過網路配送音頻資料或視頻資料等之 內容資料。例如，準備專用之記憶體卡，將其裝置於被設 置於販賣店等之專用終端，利用線上系統，將所期望之內 容資料下載於前述記憶體卡內。或將專用之記憶體卡裝置 於行動電話機等之個人用終端，利用網際網路，由內容配 送中心下載於前述記憶體卡內。於再生內容資料之情形， 將儲存內容資料之前述記憶體卡裝置於專用之再生裝置以 進行再生。 發明之揭示 經濟部智慧財產局員工消費合作社印製 且說，由上述之專用記憶體卡與再生裝置所形成之系 統中，內容資料容易複製之故，需要在儲存內容資料之專 用之記憶體卡設置複製防止機能，以謀求內容著作者等之 保護。 但是，在記憶體卡中，容量有界限之故，無法保存大 量之內容資料。使用者對於即使現在利用不到之內容資料 ，也有收集取得之情形。在此情形，如在記憶體卡附加複 製防止機能，使用者每次在記憶體卡因爲內容資料而滿載 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -4 - 515950 A7 _ ___B7_ 五、發明説明（2 ) 時，必須購入新的記憶體卡，經濟負擔大。 (請先閱讀背面之注意事項再填寫本頁) 又，使用者於要再生收集取得之內容資料之情形，必 須由數目多之記憶體卡中找出記憶要再生之內容資料之言己 憶體卡，裝置於專用之再生裝置。而且，每次記憶要再生 之內容資料之記憶體改變，必須變更裝置於再生裝置之記 憶體卡，費工夫。 由此種附加複製防止機能之記憶體卡與再生裝置所形 成之系統雖然適合於攜帶用，但是例如，不適用在家中享 受內容資料之再生之安置型。 本發明係有鑑於上述事情而完成者，本發明之目的在 於：雖然謀求內容著作者等之保護，但是不須記憶體卡之 更換也可以使之再生大量之內容資料。 爲了解決上述課題，在本發明之內容再生裝置中，於 內容資料或該資料之每一群以不同之鍵再生被加密之內容 資料。爲內容資料或該資料之每一群所準備，解碼被加密 之內容資料用之鍵係儲存在與儲存被加密之內容資料之內 容儲存手段不同之另外被設置之含計算機能儲存手段。 經濟部智慧財產局員工消費合作社印製 此處，含計算機能鍵儲存手段具有認證通訊對手之認 證手段，藉由該認證手段，內容再生裝置之再生手段被認 證爲通訊對手之情形，利用加密通訊，對再生手段傳送對 應再生對象之被加密之內容資料之鍵。又，再生手段利用 由含計算機能鍵儲存手段利用加密通訊被傳送之鍵解碼、 再生由內容儲存手段被讀出之再生對象之被加密之內容資 料。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -5- 515950 A7 B7 五、發明説明（3 ) (請先閲讀背面之注意事項再填寫本頁) 於本發明中，被儲存在內容儲存手段之內容資料被加 密之故，如無對應之鍵，無法解碼再生。因此，不需要在 內容儲存手段設置複製防止機能之特別的機能之故，作爲 內容儲存手段可以使用一般市售之大容量之硬碟裝置等。 因此，可以儲存大量之內容資料。 又，爲了解碼被儲存在內容儲存手段之內容資料，需 要對應之鍵之故，此鍵如未被儲存在含計算機能鍵儲存手 段，無法再生該內容資料。因此，可以只對正當之權利者 (具有對應之鍵者）許可內容資料之再生，可以謀求內容 著作者等之保護。 進而，在本發明中，使之以進行內容資料之再生的再 生手段進行被加密之內容資料之解碼。而且，含計算機能 鍵儲存手段在認證鍵之傳送對手爲再生手段之情形，利用 加密通訊對前述再生手段傳送該鍵。如此，可以使鍵洩漏 於外部之可能性降低，能夠提升安全性。 經濟部智慧財產局員工消費合作社印製 又，一般解碼被加密之內容資料用之鍵的資料大小與 被加密之內容資料之資料大小相比，顯著地小。因此，作 爲含計算機能鍵儲存手段即使使用可以裝置自如於本內容 再生裝置而構成之在習知技術說明之具備複製防止機能之 記憶體卡之情形，可以在該記憶體卡儲存對應大量之內容 資料之鍵。因此，可以防止改變再生內容時，必須更換記 憶體卡之事情頻繁地發生。因此，可以提供適合於在家中 能夠享受內容資料之再生之安置型之內容再生裝置。515950 A7 B7 V. Description of the invention (1) Technical field (please read the notes on the back before filling out this page) The present invention is a technology for the reproduction of content materials such as audio materials or video materials only for the right holder, In particular, the present invention relates to a placement type content reproduction device suitable for a large amount of content data. BACKGROUND ART In recent years, attempts have been made to distribute content data such as audio data and video data via the Internet. For example, a dedicated memory card is prepared, and it is installed in a dedicated terminal set up at a retail store or the like, and an online system is used to download desired content data to the aforementioned memory card. Or, a dedicated memory card device may be installed in a personal terminal such as a mobile phone and downloaded from the content distribution center to the aforementioned memory card using the Internet. In the case of reproducing content data, the aforementioned memory card device storing the content data is reproduced in a dedicated reproduction device. The disclosure of the invention is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs and said that in the system formed by the above-mentioned dedicated memory card and reproduction device, the content data is easy to copy, so it is necessary to set up a dedicated memory card for storing content data The copy prevention function protects content authors and the like. However, there is a limit on the capacity of a memory card, so a large amount of content data cannot be stored. Users may collect and obtain content data that is not available now. In this case, if the copy prevention function is added to the memory card, the user will load the memory card with content data every time. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -4-515950 A7 _ ___B7_ 5. In the description of the invention (2), a new memory card must be purchased, resulting in a large financial burden. (Please read the precautions on the back before filling out this page.) In addition, when the user wants to reproduce and collect the content data, the user must find out the memory of the content data to be reproduced from a large number of memory cards. Card, installed in a dedicated regeneration device. In addition, each time the memory of the content data to be reproduced is changed, it is necessary to change the memory card installed in the reproduction device, which takes time. Although a system formed by such an additional copy prevention function memory card and a reproduction device is suitable for carrying, it is not suitable for a placement type that enjoys reproduction of content data at home, for example. The present invention has been made in view of the above-mentioned matters, and an object of the present invention is to protect content authors and the like, but to reproduce a large amount of content data without replacing the memory card. In order to solve the above problems, in the content reproduction device of the present invention, the encrypted content data is reproduced with different keys in the content data or each group of the data. For the content data or each group of the data, the key for decoding the encrypted content data is stored in a computer-storable storage means which is different from the content storage means for storing the encrypted content data. Printed here by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The computer key storage method includes the authentication means to authenticate the counterparty. With this authentication method, the content reproduction device's reproduction means is authenticated as the counterparty. Encrypted communication is used. The key for transmitting the encrypted content data corresponding to the playback target to the playback means. In addition, the reproduction means uses a computer-readable key storage means to decode the keys transmitted by encrypted communication, and reproduces the encrypted content data of the reproduction target read out by the content storage means. This paper size is in accordance with Chinese National Standard (CNS) A4 specification (210X297 mm) -5- 515950 A7 B7 V. Description of the invention (3) (Please read the notes on the back before filling this page) In this invention, it is stored Because the content data in the content storage means is encrypted, if there is no corresponding key, it cannot be decoded and reproduced. Therefore, it is not necessary to provide a special function of the copy prevention function in the content storage means, and a commercially available large-capacity hard disk device or the like can be used as the content storage means. Therefore, a large amount of content data can be stored. In addition, in order to decode the content data stored in the content storage means, a corresponding key is required. If this key is not stored in the storage means including a computer key, the content data cannot be reproduced. Therefore, the reproduction of content data can be permitted only to the rightful owner (the person with the corresponding key), and the protection of the content author and the like can be sought. Furthermore, in the present invention, the encrypted content data is decoded by a reproduction means that reproduces the content data. In addition, in the case where the storage means including a computer-enabled key authenticates the opponent of the key as a reproduction means, the key is transmitted to the aforementioned reproduction means using encrypted communication. In this way, the possibility of keys leaking to the outside can be reduced, and safety can be improved. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. In addition, the data size of the keys used to decode the encrypted content data is generally significantly smaller than the data size of the encrypted content data. Therefore, in the case of using a computer key storage method, even if a memory card equipped with a copy prevention function in the conventional technical description which can be freely installed in the content reproduction device is used, a large amount of content can be stored in the memory card The key to data. Therefore, it is possible to prevent the memory card from having to be replaced frequently when changing the reproduction content. Therefore, it is possible to provide a placement-type content reproduction device suitable for the reproduction of content data at home.
本紙張尺度適用中國國家標準（CNS ) A4規格（210x297公釐） 515950 A7 ____ B7 五、發明説明（4 ) 圖面之簡單說明 (請先閲讀背面之注意事項再填寫本頁) 圖1係顯示本發明之1實施形態被適用之內容再生裝 置之槪略構成圖。 圖2係顯示圖1所示之鍵儲存專用裝置1 4之槪略構 成圖。 圖3係顯示圖1所示之音頻再生裝置1 8之槪略構成 圖。 圖4係顯示圖1所示之視頻再生裝置1 9之槪略構成 圖。 圖5係顯示本發明之1實施形態被適用之內容再生裝 置之槪觀之一例圖。 圖6係說明本發明之1實施形態被適用之內容再生裝 置之再生動作用之流程圖。 圖7係說明圖6所示之流程之鍵儲存專用裝置1 4以 及音頻再生裝置1 8/視頻再生裝置1 9間之資料之交換 之一例用之順序圖。 經濟部智慧財產局員工消費合作社印製 圖8係說明由被接續於本發明之1實施形態被適用之 內容再生裝置之記憶體卡3 0取得授權鍵之情形的動作用 之流程圖。 圖9係說明圖8所示之流程之鍵儲存專用裝置1 4以 移記憶體卡3 0間之資料之交換之一例用之順序圖。 圖1 0係說明由本發明之1實施形態被適用之內容再 生裝置之鍵儲存專用裝置14對被接續於本內容再生裝置 之記憶體卡3 0移動授權鍵之情形的動作用之流程圖。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 515950 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明（5 ) 主要元件對照表 1 2 記 憶 體 1 3 內 容 儲 存 裝 置 1 4 鍵 儲 存 專 用 裝 置 1 5 通 訊 裝 置 1 6 輸 入 裝 置 1 7 顯 示 裝 置 1 8 音 its 頻 再 生 裝 置 1 9 視 頻 再 生 裝 置 2 〇 卡 接 續 裝 置 2 1 介 面 3 〇 記 憶 體 卡 5 〇 遙 控 器 5 1 監 視 器 5 2 …·ϊ·[ 體 音 響 5 3 行 動 電 話 1 4 3 快 閃 記 憶 體 1 4 4 I / 〇 電 路 1 8 1 加 密 解 碼 化 電路 1 8 2 解 碼 器 電 路 1 8 4 I / 〇 電 路 1 9 3 訊 框 緩 衝 器 實施發明用之最好形態 (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -8 - 515950 A7 B7 五、發明説明（6 ) 以下，說明本發明之1實施形態。 圖1係顯示本發明之1實施形態被適用之內容再生裝 置之槪略構成圖。 (請先閲讀背面之注意事項再填寫本頁) 圖1中，C P IJ 1 1係統括地控制本內容再生裝置之 各部。記憶體1 2係由R〇Μ以及R A Μ所構成。在 R〇Μ儲存C P U 1 1統括地控制內容再生裝置之各部用 之城市。RAM作用爲CPU1 1之工作區。 內容儲存裝置1 3例如以硬碟裝置等之大容量記憶裝 置構成，被加密之音頻資料或視頻資料等之內容資料被賦 予對應其之內容名稱地被儲存。 鍵儲存專用裝置1 4儲存解碼爲每一資料所準備被加 密之內容資料用之鍵（以下，稱爲授權鍵）。 通訊裝置1 5接續於行動電話機或安置型之電話機， 被使用於透過線上系統或網際網路等之網路，例如存取配 送被加密之內容資料或授權鍵之內容配送中心（未圖示出 )，以取得被加密之內容資料或授權鍵。 經濟部智慧財產局員工消費合作社印製 輸入裝置1 6例如以各種按鈕或觸控面板構成，接受 使用者來之再生指示或內容資料、授權鍵之輸入指示。 顯示裝置1 7例如以液晶面板構成，顯示被儲存在內 容儲存裝置1 3之被加密之內容資料之內容名稱之淸單， 顯示再生對象之被加密之內容資料之內容名稱。 音頻再生裝置1 8+由內容儲存裝置1 3之中讀出再 生對象之被加密之音頻資料，利用與此對應之授權鍵解碼 、再生，獲得音頻信號。而且，將音頻信號輸出於被接續 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -9- 515950 A7 B7 五、發明説明（7 ) (請先閱讀背面之注意事項再填寫本莧) 在本內容再生裝置之立體音響。視頻再生裝置1 9由內容 儲存裝置1 3之中讀出再生對象之被加密之視頻資料，利 用與此對應之授權鍵解碼、再生，獲得視頻信號。而且， 將視頻信號輸出於被接續在本內容再生裝置之監視器。 卡接續裝置2 0接續記憶體卡3 0，由該記憶體卡 3 0取得被加密之內容名稱或授權鍵，對該記憶體卡2 〇 傳送被加密之內容名稱或授權鍵。 介面2 1係控制C P U 1 1或記憶體1 2與構成本內 容再生裝置之其它裝置之間之資料傳送接收。 接著，構成本內容再生裝置之各裝置之中，更詳細說 明鍵儲存專用裝置1 4、音頻再生裝置1 8以及視頻再生 裝置1 9。 首先，說明鍵儲存專用裝置1 4。 圖2係顯示鍵儲存專用裝置14之槪略構成圖。 如圖示般地，鍵儲存專用裝置14具有： 經濟部智慧財產局員工消費合作社印製 C P U 1 4 1，以及記憶體1 4 2，以及快閃記憶體 1 4 3，以及透過介面2 1與本內容再生裝置之各部進行 資料傳送接收用之I /〇電路1 4 4。 C P U 1 4 1係統括地控制鍵儲存專用裝置1 4之各 部。又，C P U 1 4 1具有認證機能與加密解碼化機能。 CPU 1 4 2由ROM以及RAM構成。在ROM儲存： C P U 1 4 1統括地控制鍵儲存專用裝置1 4之各部用之 程式，以及實現認證機能以及加密解碼化機能用之程式。 RAM作用爲C PU 1 4 1之工作區。授權鍵被與解碼對 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -10 - 515950 A7 ___B7 五、發明説明（8 ) (請先閲讀背面之注意事項再填寫本頁) 象內容之內容名稱賦予對應而被儲存在快閃記憶體1 4 3 。此處，授權鍵爲了使安全性更強固，可以儲存在所謂之 擅改阻止模組區域（T RM : Tamper Resistant Module ) 。又，代替快閃記憶體1 4 3，也可以使用F R A Μ或 Ε Ε Ρ R Ο Μ等之其它之不揮發性記憶體。 構成圖2所示之鍵儲存專用裝置1 4之各部例如可以 做在1個晶片上，或以複數之晶片構成。在以複數晶片構 成之情形，以施加無法由鍵儲存專用裝置1 4之外部盜取 晶片間之信號之工夫爲佳。 接著，說明音頻再生裝置1 8。 圖3係顯示音頻再生裝置18之槪略構成圖。 如圖示般地，音頻再生裝置1 8具有：加密解碼化電 路1 8 Γ，以及解碼器電路1 8 2，以及透過介面2 1與 本內容再生裝置之各部進行資料傳送接收用之I / 0電路 18 4° 經濟部智慧財產局員工消費合作社印製 加密解碼化電路1 8 1由鍵儲存專用裝置1 4取得對 應再生對象之被加密之音頻資料之授權鍵，利用此鍵，解 碼由內容儲存裝置13被讀出之再生對象之被加密之音頻 資料。解碼器電路1 8 2將在加密解碼化電路1 8 1被解 碼之音頻資料因應需要解壓縮、再生，獲得音頻信號。而 且，將音頻信號輸出於立體音響。 接著，說明視頻再生裝置1 9。圖4係顯示視頻再生 裝置19之槪略構成圖。 如圖示般地，視頻再生裝置1 9具有：加密解碼化電 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） -11 - 515950 A7 B7 五、發明説明（9 ) (請先閲讀背面之注意事項再填寫本頁) 路1 9 1，以及解碼器電路1 9 2 ,以及訊框緩衝器 1 9 3，以及透過介面2 1與本內容再生裝置之各部進行 資料傳送接收用之I /〇電路1 9 4。 加密解碼化電路1 9 1由鍵儲存專用裝置1 4取得對 應再生對象之被加密之視頻資料之授權鍵，利用此鍵，解 碼由內容儲存裝置1 3被讀出之再生對象之被加密之視頻 資料。解碼器電路1 9 2利用訊框緩衝器1 9 3，將在加 密解碼化電路1 9 1被解碼之視頻資料因應需要解壓縮、 再生，獲得視頻信號。而且，將視頻信號輸出於監視器。 接著，說明被裝置於本內容再生裝置而被使用之記憶 體卡3 0。 經濟部智慧財產局員工消費合作社印製 §5憶體卡3 0之槪略構成係與圖2所示之鍵儲存專用 裝置1 4相同。但是，在記憶體卡3 0不單授權鍵，也儲 存被加密之內容資料。即，此記憶體卡3 〇設置成可以使 用於：例如被裝置在被設置於販賣店等之專用終端，使用 者利用線上系統，取得所期望之被加密之內容資料或該授 權鍵，或被裝置於行動電話機等之個人用終端，使用者利 用網際網路，由內容配送中心取得所期望之被加密化之內 容資料或該授權鍵。 此處，圖5顯示本實施形態被適用之內容再生裝置之 槪觀之一例。如圖示般地，本內容再生裝置爲適合在家庭 內享受內容之安置型之形狀。此處，標號4 1由：再生按 鈕、停止按鈕、再生內容選擇按鈕、以及將內容資料或授 權鍵寫入內容儲存裝置1 3或鍵儲存專用裝置1 4，移動 本&張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ' -12- 515950 A7 B7 五、發明説明（10) (請先閲讀背面之注意事項再填寫本頁) 於被接續於卡接續裝置3 0之記憶體卡2 0用之各種設定 按鈕等所構成之操作面板。標號4 2係接受由具備與操作 面板4 1相同之各種按鈕之遙控器5 0來之指示用之接收 部。標號4 3係顯示面板，顯示被儲存在內容儲存裝置 1 3之內容資料之內容名稱之淸單、顯示再生對象之被加 密之內容資料之內容名稱。而且，標號44爲裝置記憶體 卡3 0用之插槽。又，雖然未圖示出，但是在本內容裝置 之背面設置有接續監視器5 1或立體音響5 2或行動電話 機5 3或電話機用之端子。 接著，說明本實施形態之內容再生裝置之動作。 首先，說明再生內容資料之情形的動作。 圖6係說明本實施形態被適用之內容再生裝置之再生 .動作用之流程圖。此流程例如使用者利用輸入裝置1 6， 由被顯示在顯示裝置17之被儲存在內容儲存裝置13之 內容資料之內容名稱之淸單之中，選擇再生對象之內容， 輸入再生指示而被開始。 經濟部智慧財產局員工消費合作社印製 首先，CPU11透過輸入裝置16由使用者接受之 內容資料之再生指示傳送於再生該內容資料之種類（音頻 資料/視頻資料）之音頻再生裝置1 8 /視頻再生裝置 1 9 ( S 1 〇〇 1 )。 由C P U 1 1取得再生指示之音頻再生裝置1 8 /視 頻再生裝置1 9之加密解碼化電路1 8 1/1 9 1將包含 本身之認證資料與再生對象之被加密之內容資料之辨識資 訊（例如，內容名稱）之該內容資料再生用之授權鍵傳送 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 一 一 -13- 515950 A7 __B7 五、發明説明（11 ) 於鍵儲存專用裝置14(Sl〇〇2)。 (請先閲讀背面之注意事項再填寫本頁) 鍵儲存專用裝置1 4之C PU 1 4 1如取得內容資料 再生用之授權鍵傳送指示，利用被包含在該指示之認證資 料進行驗證（S 1 〇 0 3 )。例如，調查是否顯示爲認證 資料預先被登錄在本鍵儲存專用裝置1 4之音頻/視頻再 生裝置。而且，如認證該指示之傳送來源爲音頻再生裝置 18/視頻再生裝置19 (S 1〇〇4中，Yes之情形 )，調查藉由被包含在該指示之辨識資訊被特定之內容資 料之授權鍵是否被儲存在快閃記憶體1 4 3 ( S 1 0 〇 5 )。如被儲存（S 1 0 0 6中，Y e s之情形），由快問 記憶體1 4 3讀出該授權鍵，利用加密通訊，傳送於該指 示之傳送來源之音頻再生裝置18/視頻再生裝置19 ( s 1 〇 〇 8 )。 經濟部智慧財產局員工消費合作社印製 又，於S 1 〇 〇 4中，在無法認證指示之傳送來源爲 音頻再生裝置1 8 /視頻再生裝置1 9之情形，以及在 S 1 0 0 6中，所期望之授權鍵未被儲存在快閃記憶體 1 4 3之情形，鍵儲存專用裝置1 4之C P U 1 4 1對 CPU11傳達該旨意。接受此，CPU11對顯示裝置 1 7進行錯誤顯示等，進行指定之錯誤處理（S 1 0 〇 了 )° 且說，傳送內容資料再生用之授權鍵傳送指示之音頻 再生裝置1 8 /視頻再生裝置1 9之加密解碼化電路 1 8 1 / 1 9 1如由鍵儲存專用裝置1 4取得授權鍵，由 內容儲存裝置1 3讀出再生對象之被加密之內容資料（ 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -14- 515950 A7 B7_____ 五、發明説明（12 ) (請先閲讀背面之注意事項再填寫本頁) s 1 0 0 9 )。而且，以授權鍵將其解碼，傳達於解碼器 電路1 8 2/1 9 2。解碼器電路1 8 2/1 9 2將由加 密解碼化電路1 8 1 / 1 9 1所取得之內容資料因應需要 解壓縮、再生，獲得音頻/視頻，輸出於立體音響/監視 器（S 1 〇 1 0 )。 接著，關於圖6所示之流程之鍵儲存專用裝置1 4以 及音頻再生裝置1 8/視頻再生裝置1 9間之資料之交換 ，說明其之一例。 圖7係說明圖6所示之流程之鍵儲存專用裝置1 4以 及音頻再生裝置1 8/視頻再生裝置1 9間之資料之交換 之一例用之順序圖。 音頻再生裝置1 8/視頻再生裝置1 9之加密解碼化 電路1 81/1 9 1於圖6之S 1 00 2中，，製作包含： 本身之認證資料，以及再生對象之被加密化之內容資料之 辨識資訊，以及預先保持之媒體等級密碼鍵Κ P M C：與成對 之媒體等級公開鍵Κ ◦ μ e之授權鍵傳送指示，將其傳送於 鍵儲存專用裝置14 (T1001)。 經濟部智慧財產局員工消費合作社印製 接受此，鍵儲存專用裝置14之CPU 14 1於圖6 之S1004〜S1007中，進行音頻再生裝置18/ 視頻再生裝置1 9之認證，以及所要求之授權鍵被儲存在 快閃記憶體1 4 3之確認（T 1 〇 〇 2 )。之後， C P U 1 4 1 產生對話期間鍵（session key ) K s 1 ( T1003)，將其以被包含在授權鍵傳送指示之媒體等 級公開鍵K。μ。加密，傳送於該指示之傳送來源之音頻再 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ297公釐） -15- 515950 A7 _______B7__ 五、發明説明（13 ) 生裝置18/視頻再生裝置19 (T1004) (請先閱讀背面之注意事項再填寫本頁) 接受此，音頻再生裝置1 8/視頻再生裝置1 9之加 密解碼化電路1 8 1 / 1 9 1以預先保持之媒體等級祕密 鍵K P M C解碼被加密之對話期間鍵κ s 1，獲得對話期 間鍵Ksl (Τ1005)。之後，產生隨機數Ks2 ( T 1 〇 〇 6 )，以對話期間鍵K s 1加密，傳送於鍵儲存 專用裝置1 4 ( T 1 〇 〇 7 )。 接受此，鍵儲存專用裝置1 4之C P U 1 4 1以對話 期間鍵K s 1解碼被加密之隨機數κ s 2，獲得隨機數 Ks2 (T1008)。而且，以隨機數Ks2加密被要 求傳送之授權鍵K c，傳送於授權鍵傳送指示之傳送來源 之音頻再生裝置18/視頻再生裝置19 (Tl〇〇9) 〇 . 接受此，音頻再生裝置1 8/視頻再生裝置1 9之加 密解碼化電路1 8 1 / 1 9 1利用隨機數K s 2解碼被加 密之授權鍵K c，獲得授權鍵K c ( T 1 〇 1 〇 )。 以上，說明再生內容資料之情形的動作。 經濟部智慧財產局員工消費合作社印製 接著，說明由記憶體卡3 0取得授權鍵之情形的動作 〇 圖8係說明由被接續於本實施形態被適用之內容再生 裝置之記憶體卡3 0取得授權鍵之情形的動作用之流程圖 。此流程例如在記憶體卡3 0被裝置於本內容再生裝置之 狀態，使用者利用輸入裝置1 6，由封應被顯不在顯示裝 置1 7之被儲存在記憶體卡3 0之授權鍵之內容名稱之淸 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -16- 515950 A7 B7 五、發明説明（14 ) 單之中，選擇對應輸入對象之授權鍵之內容，一輸入授權 鍵輸入指示而被開始。 (請先閲讀背面之注意事項再填寫本頁) 首先，CPU 11透過輸入裝置16由使用者一接受 授權鍵輸入指示，將該旨意傳送於鍵儲存專用裝置14( S 2〇〇1 )。 由C P U 1 1取得授權鍵輸入指示之鍵儲存專用裝置 1 4之C P U 1 4 1將包含本身之認證資料與輸入對象之 授權鍵之辨識資訊（例如，以該鍵可以解碼之內容名稱） 之該授權鍵輸入用之授權鍵傳送指示傳送於被接續在卡接 續裝置2 0之記憶體卡3〇（S 2 0 0 2 )。 記憶體卡3 0之C P U如取得授權鍵輸入用之授權鍵 傳送指示，利用被包含在該指示之認證資料進行驗證（ S 2 0 0 3 )。例如，調查是否顯示爲認證資料預先被登 錄在本記憶體卡3 0之鍵儲存專用裝置。而且，如認證該 指示之傳送來源爲鍵儲存專用裝置1 4 ( S 2 0 〇 4中， Y e s之情形），調查藉由被包含在該指示之辨識資訊而 被特定之授權鍵是否被儲存在記憶體卡3 0內（ 經濟部智慧財產局員工消費合作社印製 S 2 0 0 5 )。如被儲存（S2006中，Yes之情形 )，讀出該授權鍵，利用加密通訊，傳送於該指示之傳送 來源之鍵儲存專用裝置14 (S2008)。之後，由記 憶體卡3 0削除傳送之授權鍵（S 2 0 0 9 )。 又，於S 2 0 0 4中，在無法認證指示之傳送來源爲 鍵儲存專用裝置1 4之情形，以及在S 2 0 0 6中，所期 望之授權鍵未被儲存在記憶體卡3 0內之情形，記憶體卡 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -17- 515950 A7 B7_ 五、發明説明（15 ) 30之CPU將該旨意傳達於CPU1 1。接受此， (請先閱讀背面之注意事項再填寫本頁) C P U 1 1於顯示裝置1 7進行錯誤顯示等，進行指定之 錯誤處理（S2007)。 且說，傳送授權鍵輸入用之授權鍵傳送指示之鍵儲存 專用裝置1 4之C Ρ ϋ 1 4 1如由被接續於卡接續裝置 2 0之記憶體卡3 0取得授權鍵，將其例如賦予對應於以 該鍵可以解碼之內容資料之內容名稱而儲存在快閃記憶體 143 (S2010)。 接著，關於圖8所示之流程之鍵儲存專用裝置1 4以 及記憶體卡3 0間之資料之交換，說明其之一例。 圖9係說明圖8所示之流程之鍵儲存專用裝置1 4以 及記憶體卡3 0間之資料之交換之一例用之順序圖。 鍵儲存專用裝置1 4之C Ρ ϋ 1 4 1於圖8之 S 2 0 0 2中，製作包含：本身之認證資料，以及輸入對 象之授權鍵之辨識資訊，以及預先保持之媒體等級密碼鍵 Κ ’ Ρ M C：與成對之媒體等級公開鍵Κ ’。Μ。之授權鍵傳送指示 ，將其傳送於記憶體卡3 0 ( Τ 2 0 0 1 )。 經濟部智慧財產局員工消費合作社印製 接受此，記憶體卡3 0之C P U於圖8之S 2 0 0 4 〜S 2 0 0 7中，進行鍵儲存專用裝置1 4之認證，以及 被要求之授權鍵被儲存在記憶體卡3 0內之確認（ Τ 2 0 0 2 )。之後，記憶體卡3 0之C P U產生對話期 間鍵K s 1 ( Τ 2 0 0 3 )，將其以被包含在授權鍵傳送 指示之媒體等級公開鍵Κ，◦ μ。加密，傳送於該指示之傳送 來源之鍵儲存專用裝置14(Τ2004)。 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X29*7公釐） -18- 515950 Α7 Β7 五、發明説明（16) (請先閲讀背面之注意事項再填寫本頁) 接受此，鍵儲存專用裝置14之CPU141以預先 保持之媒體等級祕密鍵K ’ P M c解碼被加密之對話期間鍵 K s 1，獲得對話期間鍵κ s 1 ( T 2 0 〇 5 )。之後， 產生隨機數K s 2 ( τ 2 0 〇 6 )，以對話期間鍵K s 1 加密其與預先保持之媒體固有祕密鍵K ’ Ρ Μ與成對之媒體固 有公開鍵Κ ’。μ，傳送於記憶體卡3 0 ( Τ 2 0 0 7 )。 接受此，記憶體卡3 0之C P U以對話期間鍵κ s 1 解碼被加密之隨機數K s 2與媒體等級固有公開鍵κ，◦ μ， 獲得隨機數K s 2與媒體固有公開鍵Κ ’ ◦ μ ( τ 2 0 0 8 ) 。而且，以媒體固有公開鍵Κ ’◦ M C加密被要求傳送之授權 鍵K c，進而，以隨機數Κ ’ s 2加密此，傳送於授權鍵傳 送指示之傳送來源之鍵儲存專用裝置1 4 (Τ2 0 〇 9 ) 〇 接受此，鍵儲存專用裝置1 4之c P U 1 4 1利用隨 機數K s 2與媒體固有祕密鍵Κ ’ ρ μ解碼被加密之授權鍵 K c，獲得授權鍵K c ( Τ 2 0 1 0 )。 以上，說明由記憶體卡3 0取得授權鍵之情形的動作 〇 經濟部智慧財產局員工消費合作社印製 接著，說明將被儲存於本內容再生裝置之鍵儲存專用 裝置1 4之授權鍵往記憶體卡3 0移動之情形的動作。 圖1 0係說明由本實施形態被適用之內容再生裝置之 鍵儲存專用裝置1 4對被接續於本內容再生裝置之記憶體 卡3 0移動授權鍵之情形的動作用之流程圖。此流程例如 在記憶體卡3 0被裝置於本內容再生裝置之狀態，使用者 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ297公釐） -19- 515950 A7 B7 五、發明説明（17) (請先閱讀背面之注意事項再填寫本頁) 利用輸入裝置1 6，由對應被顯示在顯示裝置1 7之被儲 存在鍵儲存專用裝置14之授權鍵之內容名稱之淸單之中 ，選擇對應移動對象之授權鍵之內容，一輸入授權鍵移動 指示而被開始。 首先，c PU 1 1透過輸入裝置1 6由使用者一接受 授權鍵移動指示，將該旨意傳送於記憶體卡3 0。 由C P U 1 1取得授權鍵移動指示之記憶體卡3 0之 C P U將包含本身之認證資料與移動對象之授權鍵之辨識 資訊（例如，可以以該鍵解碼之內容名稱）之該授權鍵移 動用之授權鍵傳送指示傳送於鍵儲存專用裝置1 4 ( s 3 〇 0 2 ) ° 鍵儲存專用裝置1 4之c PU 1 4 1如取得授權鍵移 動用之授權鍵傳送指示，利用被包含在該指示之認證資料 進行驗證（S 3 0 0 3 )。例如，調查是否顯示爲認證資 料預先被登錄在本鍵儲存專用裝置1 4之記憶卡3 0。而 且，如認證該指示之傳送來源爲記憶體卡3 0 ( 經濟部智慧財產局員工消費合作社印製 S3004中，Ye s之情形），調查藉由被包含在該指 示之辨識資訊而被特定之授權鍵是否被儲存在快閃記憶體 143內（S3005)。如被儲存（S3006中， Y e s之情形），讀出該授權鍵，利用加密通訊，傳送於 該指示之傳送來源之記憶體卡3 0 ( S 3 0 0 8 )。之後 ，由快閃記憶體1 4 3內削除傳送之授權鍵（S 3 0 0 9 )° 又，於S 3 0 0 4中，在無法認證指示之傳送來源爲 本紙張尺度適用中國國家標準（CNS ) A4規格（210X：297公董） -20- 515950 A7 B7 _ 五、發明説明（18 ) (請先閱讀背面之注意事項再填寫本頁) 記憶體卡3 0之情形，以及在s 3 0 0 6中，所期望之授 權鍵未被儲存在快閃記億體1 4 3內之情形，鍵儲存專用 裝置14之CPU141將該旨意傳達於CPU1 1。接 受此，C P U 1 1於顯示裝置1 7進行錯誤顯示等，進行 指定之錯誤處理（S 3 〇 〇 7 )。 且說，傳送授權鍵移動用之授權鍵傳送指示之記憶體 卡3 0之C PU如由鍵儲存專用裝置1 4接受授權鍵，將 其例如與以該鍵可以解碼之內容資料之內容名稱賦予對應 ，儲存在記憶體卡3 0內（S 3 0 1〇）。 又，圖1 0所示之流程之鍵儲存專用裝置1 4以及記 憶體卡3 0間之資料之交換在圖9所示之順序圖中，係將 鍵儲存專用裝置1 4以及記憶體卡3 0之動作相互更換者 〇 以上，說明對記億體卡3 0移動授權鍵之情形的動作 〇 經濟部智慧財產局員工消費合作社印製 又，利用被接續於通訊裝置1 5之行動電話機/安置 型電話機，透過線上系統或網際網路等之網路，由內容配 送中心（未圖示出）取得授權鍵之情形的動作一般可以爲 與透過網路下載者相同。但是，爲了使之只有具有正當權 利者可以取得授權鍵，在鍵儲存專用裝置1 4與內容配送 中心之間進行認證處理，以只在內容配送中心認證鍵儲存 專用裝置1 4之情形，使之許可授權鍵之下載爲佳。又， 內容資料之對內容儲存裝置1 3之下載例如可以複製被儲 存在記憶體卡30之內容資料，使之儲存在內容儲存裝置 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -21 - 515950 A7 B7 五、發明説明（19 ) (請先閱讀背面之注意事項再填寫本頁) 1 3，或利用被接續於通訊裝置1 5之行動電話機/安置 型電話機，透過線上系統或網際網路等之網路，由內容配 送中心（未圖示出）取得，使之儲存在內容儲存裝置1 3 。不管哪種情形，內容資料被加密，如無對應之授權鍵， 無法解碼、再生。 以上，說明本發明之1實施形態。 於本實施形態中，被儲存在內容儲存裝置1 3之內容 資料被加密之故，如無對應之授權鍵，無法解碼、再生。 因此，不虛在內容儲存裝置1 3設置複製防止機能之特別 的機能之故，作爲內容儲存裝置1 3可以利用一般被市售 之大容量之硬碟裝置等。因此，可以儲存大量之內容資料 〇 又，爲了解碼被儲存在內容儲存裝置1 3之內容資料 ，需要對應之授權鍵之故，此授權鍵無法被儲存在鍵儲存 專用裝置1 4，無法再生該內容資料。因此，可以只對正 當權利者（具有對應之授權鍵者）許可內容資料之再生， 能夠謀求內容著作者等之保護。 經濟部智慧財產局員工消費合作社印製 進而，在本實施形態中，在進行內容資料之再生之音 頻再生裝置1 8/視頻再生裝置1 9進行被加密之內容資 料之解碼。而且，鍵儲存專用裝置1 4在認證授權鍵之傳 送對手爲音頻再生裝置1 8 /視頻再生裝置1 9之情形， 利用加密通訊將該授權鍵傳送於音頻再生裝置1 8 /視頻 再生裝置1 9。如此爲之，可以使授權鍵洩漏於外部之可 能性降低，能夠提升安全性。 1紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -22 - 515950 A7 B7 _ 五、發明説明（2〇 ) (請先閱讀背面之注意事項再填寫本頁) 除此之外，於本實施形態中，鍵儲存專用裝置1 4在 授權鍵之傳送對手爲記憶體卡3 0之情形，將傳送之授權 鍵由鍵儲存專用裝置1 4之記憶內容削除。即，於鍵儲存 專用裝置1 4設置授權鍵之複製防止機能。如此爲之，可 以減少授權鍵被不正當複製之可能性。 又，一般鍵之資料大小如與被加密之內容資料之資料 大小相比，顯著地小。因此，即使以快閃記憶體1 4 3構 成鍵儲存專用裝置1 4之記憶部之情形，也可以在該快閃 記憶體1 4 3儲存很多之授權鍵。因此，可以提供適用於 在家中可以享受內容資料之再生之安置型之內容再生裝置 〇 又，本發明並非被限定於上述之實施形態，在其之要 .旨之範圍內可以有種種之變形。 經濟部智慧財產局員工消費合作社印製 例如，在上述之實施形態中，以被加密之內容資料例 如被儲存在以硬碟裝置等之記憶裝置構成之內容儲存裝置 1 3之情形爲例而做說明。但是，本發明並不被限定於此 。被加密之內容資料也可以以被儲存在D V D或C D等之 具有可搬性之記憶媒體之形態被提供。在此情形，於本實 施形態中，代替內容儲存裝置1 3設置由具有前述可搬性 之記憶媒體讀取被加密之內容資料之裝置即可。 又，於上述之實施形態中，也可以裝置自如地構成鍵 儲存專用裝置1 4。例如，作爲鍵儲存專用裝置1 4可以 使用記憶體卡3 0，使之裝置於卡接續裝置2 0。或在本 內容再生裝置設置鍵儲存專用裝置1 4專用之插槽，在此 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） '" -23- 515950 A7 B7 五、發明説明（21 ) 插槽裝置鍵儲存專用裝置1 4即可。如上述般地，鍵之資 料大小與被加密之內容資料之資料大小相比，顯著小之故 ，可以在鍵儲存專用裝置1 4儲存很多之授權鍵。因此， 可以防止在改變再生之內容時，必須更換鍵儲存專用裝置 1 4之事態頻繁發生。因此，可以提供適用於在家中可以 享受內容資料之再生之安置型之內容再生裝置。 進而，在上述之實施形態中，雖依每一被加密之內容 資料而準備授權鍵，但是本發明並不被限定於此。例如， 將複數之被加密之內容資料當成1組，每一組準備解碼屬 於該組之被加密之內容資料用之授權鍵即可。 如以上說明般地，如依據本發明，可以一面謀求內容 著作者之保護，一面不需要記憶體卡之更換，可以再生大 量之內容資料。 (請先閲讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 24-This paper size applies to Chinese National Standard (CNS) A4 (210x297 mm) 515950 A7 ____ B7 V. Description of the invention (4) Brief description of the drawing (please read the notes on the back before filling this page) Figure 1 shows A schematic configuration diagram of a content playback device to which the first embodiment of the present invention is applied. Fig. 2 is a diagram showing a schematic configuration of the key storage dedicated device 14 shown in Fig. 1. Fig. 3 is a diagram showing a schematic configuration of the audio reproduction device 18 shown in Fig. 1. Fig. 4 is a diagram showing a schematic configuration of the video reproduction device 19 shown in Fig. 1. Fig. 5 is a view showing an example of a content reproduction device to which the first embodiment of the present invention is applied. Fig. 6 is a flowchart for explaining the playback operation of the content playback device to which the first embodiment of the present invention is applied. FIG. 7 is a sequence diagram illustrating an example of data exchange between the key storage dedicated device 14 and the audio reproduction device 18 / video reproduction device 19 in the flow shown in FIG. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs FIG. 8 is a flowchart illustrating the operation of obtaining the authorization key from the memory card 30 of the content reproduction device to which the first embodiment of the present invention is applied. FIG. 9 is a sequence diagram illustrating an example of the key storage dedicated device 14 for transferring the data between the memory cards 30 in the flow shown in FIG. 8. Fig. 10 is a flow chart for explaining the operation of the key storage dedicated device 14 of the content reproduction device to which the first embodiment of the present invention is applied to the case where the memory card 30 connected to the content reproduction device moves the authorization key. This paper size applies to Chinese National Standard (CNS) A4 specification (210X297 mm) 515950 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (5) Comparison table of main components 1 2 Memory 1 3 Content storage device 1 4 key storage dedicated device 1 5 communication device 1 6 input device 1 7 display device 1 8 audio and video frequency reproduction device 1 9 video reproduction device 2 〇 card connection device 2 1 interface 3 〇 memory card 5 〇 remote control 5 1 monitoring Device 5 2… · ϊ · [Body audio 5 3 Mobile phone 1 4 3 Flash memory 1 4 4 I / 〇 circuit 1 8 1 Encryption and decoding circuit 1 8 2 Decoder circuit 1 8 4 I / 〇 circuit 1 9 3 The best form for implementing the invention of the frame buffer (please read the precautions on the back before filling this page) This paper size is applicable to China National Standard (CNS) A4 specification (210X297 mm) -8-515950 A7 B7 V. Description of the Invention (6) Hereinafter, an implementation of the present invention will be described. form. Fig. 1 is a schematic configuration diagram showing a content reproduction device to which an embodiment of the present invention is applied. (Please read the precautions on the back before filling out this page.) In Figure 1, the C P IJ 1 1 system controls the various parts of the content reproduction device. The memory 12 is composed of ROM and RAM. The ROM stores CP U 1 1 to collectively control the cities used by the various parts of the content reproduction device. RAM is used as the work area of CPU1 1. The content storage device 13 is constituted by, for example, a large-capacity memory device such as a hard disk device, and encrypted content data such as audio data or video data is stored with a content name assigned thereto. The key storage dedicated device 14 stores a key (hereinafter, referred to as an authorization key) for decoding encrypted content data prepared for each data. The communication device 15 is connected to a mobile phone or a set-type telephone, and is used to access an encrypted content data or authorized content distribution center (not shown) through an online system or an Internet network, such as a content distribution center. ) To obtain encrypted content data or authorization keys. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the input device 16 is composed of various buttons or touch panels, for example, and accepts the reproduction instructions, content data, and authorization key input instructions from the user. The display device 17 is constituted by, for example, a liquid crystal panel, and displays a list of content names of the encrypted content data stored in the content storage device 13 and displays a content name of the encrypted content data to be reproduced. The audio reproduction device 18+ reads the encrypted audio data of the reproduction object from the content storage device 13 and decodes and reproduces it using the corresponding authorized key to obtain an audio signal. In addition, the audio signal is output to the paper size of the connected paper. It is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -9-515950 A7 B7 V. Description of the invention (7) (Please read the precautions on the back before filling in Ben 苋) Stereo sound in this content reproduction device. The video reproduction device 19 reads out the encrypted video data of the reproduction object from the content storage device 13 and decodes and reproduces it using the corresponding authorization key to obtain a video signal. The video signal is output to a monitor connected to the content reproduction device. The card connection device 20 connects the memory card 30, and the encrypted content name or authorization key is obtained from the memory card 30, and the encrypted content name or authorization key is transmitted to the memory card 20. The interface 2 1 controls data transmission and reception between the C P U 1 1 or the memory 12 and other devices constituting the content reproduction device. Next, among the devices constituting the content playback device, the key storage dedicated device 14, the audio playback device 18, and the video playback device 19 are described in more detail. First, the key storage dedicated device 14 will be described. FIG. 2 is a schematic configuration diagram showing the key storage dedicated device 14. As shown in FIG. As shown in the figure, the key storage dedicated device 14 has: printed by the consumer property cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs CPU 1 4 1 and memory 1 4 2 and flash memory 1 4 3; and through the interface 2 1 and Each part of the content reproduction device performs an I / O circuit 144 for transmitting and receiving data. The C P U 1 4 1 system includes all parts of the dedicated storage device 14 for the control keys. In addition, C P U 1 4 1 has an authentication function and an encryption / decoding function. The CPU 142 is composed of a ROM and a RAM. Stored in ROM: C P U 1 4 1 Control keys store the programs used by the various parts of the dedicated device 14 and the programs used to implement the authentication function and the encryption / decoding function. The RAM functions as a working area of the CPU 1 4 1. The authorized key is decoded and applied to the Chinese paper standard (CNS) A4 specification (210X297 mm) for this paper size -10-515950 A7 ___B7 V. Description of the invention (8) (Please read the precautions on the back before filling this page) Image content The corresponding content name is assigned and stored in the flash memory 1 4 3. Here, the authorization key can be stored in a so-called Tamper Resistant Module area (TRM) for stronger security. In addition, instead of the flash memory 143, other nonvolatile memories such as F R A M or E E P R 0 M may be used. Each part constituting the key storage-dedicated device 14 shown in Fig. 2 may be formed on, for example, a single wafer or a plurality of wafers. In the case of a plurality of wafers, it is better to apply the time that the signals between the wafers cannot be stolen from the outside of the key storage dedicated device 14. Next, the audio playback device 18 will be described. FIG. 3 is a schematic configuration diagram showing the audio reproduction device 18. As shown in the figure, the audio reproduction device 18 has an encryption / decryption circuit 1 8 Γ, a decoder circuit 1 8 2, and I / 0 for transmitting and receiving data to and from each part of the content reproduction device through the interface 21. Circuit 18 4 ° The encryption and decoding circuit printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 1 8 1 The key storage dedicated device 1 4 Obtains the authorized key corresponding to the encrypted audio data of the reproduction object. Use this key to decode the stored content The encrypted audio data of the reproduction target to be read by the device 13. The decoder circuit 1 8 2 decompresses and reproduces the audio data decoded by the encryption and decoding circuit 1 8 1 as needed to obtain an audio signal. Furthermore, the audio signal is output to a stereo. Next, the video playback device 19 will be described. FIG. 4 is a schematic configuration diagram showing the video reproduction device 19. As shown in FIG. As shown in the figure, the video reproduction device 19 has: the size of the encrypted and decoded paper is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -11-515950 A7 B7 5. Description of the invention (9) (please first Read the notes on the back and fill in this page) Road 1 9 1 and decoder circuit 1 9 2 and frame buffer 1 9 3, and for transmitting and receiving data through the interface 2 1 and each part of the content reproduction device. I / 〇circuit 1 94. Encryption / decoding circuit 1 9 1 obtains the authorized key corresponding to the encrypted video data of the playback target by the key storage dedicated device 14 and uses this key to decode the encrypted video of the playback target read by the content storage device 13 data. The decoder circuit 192 uses the frame buffer 193 to decompress and reproduce the video data decoded in the encryption and decoding circuit 191 as needed to obtain a video signal. The video signal is output to a monitor. Next, the memory card 30 used in the content reproduction device will be described. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs §5 The general structure of the memory card 30 is the same as the key storage device 14 shown in FIG. 2. However, not only the authorization key, but also the encrypted content data are stored in the memory card 30. That is, the memory card 30 is provided so that it can be used: for example, it is installed in a dedicated terminal installed in a retail store, etc. The user uses the online system to obtain the desired encrypted content data or the authorization key, or is used by The device is installed on a personal terminal such as a mobile phone. The user uses the Internet to obtain the desired encrypted content data or the authorization key from the content distribution center. Here, Fig. 5 shows an example of a view of a content reproduction device to which this embodiment is applied. As shown in the figure, the content reproduction device is a placement type suitable for enjoying content in a home. Here, the reference numeral 41 is composed of a reproduction button, a stop button, a reproduction content selection button, and a content storage device or an authorization key written in the content storage device 13 or a key storage dedicated device 1 4. The mobile book & Zhang scale is applicable to the country of China Standard (CNS) A4 specification (210X297 mm) '-12- 515950 A7 B7 V. Description of the invention (10) (Please read the precautions on the back before filling this page) The memory connected to the card connection device 30 An operation panel composed of various setting buttons and the like used for the card 20. Reference numeral 4 2 is a receiving unit for receiving instructions from a remote controller 50 having various buttons similar to those of the operation panel 41. Reference numeral 4 3 is a display panel that displays a list of content names of the content data stored in the content storage device 1 and displays content names of the encrypted content data to be reproduced. Further, reference numeral 44 is a slot for the device memory card 30. Also, although not shown, a back-up monitor 51, a stereo 52, a mobile phone 53, or a terminal for a telephone are provided on the back of the content device. Next, the operation of the content playback device of this embodiment will be described. First, an operation in a case where content data is reproduced will be described. FIG. 6 is a flowchart for explaining the playback and operation of the content playback device to which this embodiment is applied. This flow is, for example, when the user uses the input device 16 to display the content name list of the content data stored in the content storage device 13 on the display device 17, select the content to be reproduced, and enter a reproduction instruction to start. . Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs First, the CPU 11 transmits the reproduction instruction of the content data accepted by the user through the input device 16 to the audio reproduction device 1 8 which reproduces the type of the content data (audio data / video data) Regeneration device 19 (S 1001). The audio reproduction device 18 / video reproduction device 19 which obtained the reproduction instruction from the CPU 1 1 and the encryption / decoding circuit 1 8 1/1 9 1 will include the identification information of its own authentication data and the encrypted content data of the reproduction object ( For example, the content key) is used to transmit the authorized key for the reproduction of the content data. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm)-13- 515950 A7 __B7 V. Description of the invention (11) Key storage Dedicated device 14 (S102). (Please read the precautions on the back before filling this page) Key storage dedicated device 1 4 CPU 1 4 1 If you obtain the authorization key for content data reproduction, send the instruction, and use the authentication information included in the instruction to verify (S 1 0 0 3). For example, it is investigated whether or not the authentication data is registered in the audio / video reproduction device of the key storage dedicated device 14 in advance. Furthermore, if it is verified that the transmission source of the instruction is the audio reproduction device 18 / video reproduction device 19 (in the case of Yes in S 1004), investigate the authorization of the specific content data by the identification information included in the instruction Whether the key is stored in the flash memory 143 (S 1005). If it is stored (in the case of Yes in S 1 0 06), the authorization key is read from the quick memory 1 4 3, and the encrypted reproduction is transmitted to the audio reproduction device 18 / video reproduction of the transmission source of the instruction. Device 19 (s 1008). Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. In S 1 004, when the transmission source of the uncertifiable instruction is an audio reproduction device 18 / video reproduction device 19, and in S 1 0 06 In the case where the desired authorized key is not stored in the flash memory 1 4 3, the CPU 1 4 1 of the key storage dedicated device 14 conveys the intention to the CPU 11. In response to this, the CPU 11 performs an error display on the display device 17 and performs designated error processing (S 100). Furthermore, the audio reproduction device 1 8 / video reproduction device 1 that transmits an authorized key transmission instruction for reproduction of content data Encryption / decoding circuit of 9 1 8 1/1 9 1 If the authorized key is obtained by the key storage dedicated device 14 and the content storage device 13 reads the encrypted content data of the reproduction object (this paper size applies Chinese national standards ( CNS) A4 specification (210X297 mm) -14- 515950 A7 B7_____ V. Description of invention (12) (Please read the precautions on the back before filling this page) s 1 0 0 9). It is decoded with the authorization key and transmitted to the decoder circuit 1 8 2/1 9 2. The decoder circuit 1 8 2/1 9 2 decompresses and reproduces the content data obtained by the encryption and decoding circuit 1 8 1/1 9 1 as needed to obtain audio / video, and outputs the audio / video to a stereo / monitor (S 1 〇 1 0). Next, an example of data exchange between the key storage dedicated device 14 and the audio reproduction device 18 / video reproduction device 19 in the flow shown in FIG. 6 will be described. FIG. 7 is a sequence diagram illustrating an example of data exchange between the key storage dedicated device 14 and the audio reproduction device 18 / video reproduction device 19 in the flow shown in FIG. Encryption / decryption circuit 1 81/1 9 1 of audio reproduction device 1 / video reproduction device 19 In S 1 00 2 of FIG. 6, the production includes: the authentication data itself, and the encrypted content of the reproduction object The identification information of the data, and the pre-retained media-level password key K PMC: an authorized key transmission instruction with the paired media-level public key κ ◦ μe, which is transmitted to the key storage dedicated device 14 (T1001). Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, accepting this, the CPU 14 1 of the key storage special device 14 performs the authentication of the audio reproduction device 18 / video reproduction device 19 and the required authorization in S1004 to S1007 of FIG. 6 The key is stored in the flash memory 143 to confirm (T 1002). Thereafter, C P U 1 4 1 generates a session key K s 1 (T1003), and publicly releases the key K of the media level included in the authorization key transmission instruction. μ. Encrypted, the audio reproduction paper transmitted from the transmission source of the instruction is in accordance with the Chinese National Standard (CNS) A4 specification (210 × 297 mm) -15- 515950 A7 _______B7__ V. Description of the invention (13) Production device 18 / Video reproduction device 19 (T1004) (Please read the precautions on the back before filling in this page) Accept this, the encryption and decoding circuit of the audio reproduction device 1 8 / video reproduction device 1 9 1 8 1/1 9 1 secret key with the media level kept in advance KPMC decodes the encrypted session key κ s 1 to obtain the session key Ksl (T1005). After that, a random number Ks2 (T 1 〇 6) is generated, encrypted with the key K s 1 during the conversation, and transmitted to the key storage dedicated device 1 4 (T 1 〇 7). Accepting this, the C P U 1 4 1 of the key storage dedicated device 14 decodes the encrypted random number κ s 2 with the key K s 1 during the conversation to obtain a random number Ks 2 (T1008). Furthermore, the authorization key K c requested to be transmitted is encrypted with a random number Ks2 and transmitted to the audio reproduction device 18 / video reproduction device 19 (T109) of the transmission source of the authorization key transmission instruction. Accepting this, the audio reproduction device 1 8 / The video decoding device 19 encrypts and decodes the circuit 1 8 1/1 9 1 to decode the encrypted authorization key K c with a random number K s 2 to obtain the authorization key K c (T 1 〇 1 〇). The operation in the case where content data is reproduced has been described above. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Next, the operation of obtaining the authorization key from the memory card 30 will be described. FIG. 8 illustrates the memory card 30 that is connected to the content reproduction device to which this embodiment is applied. The flowchart for the operation of obtaining the authorization key. This flow is, for example, in a state where the memory card 30 is installed in the content reproduction device. The user uses the input device 16 to display the authorization key stored in the memory card 30 in the display device 17 by the cover. The paper size of the content name is in accordance with the Chinese National Standard (CNS) A4 specification (210X297 mm) -16- 515950 A7 B7 5. In the description of the invention (14), select the content of the authorization key corresponding to the input object, one input The authorization key input instruction is started. (Please read the precautions on the back before filling this page) First, the CPU 11 accepts the authorized key input instruction by the user through the input device 16 and transmits the intention to the key storage dedicated device 14 (S 2000). The key storage instruction for the authorized key input instruction obtained by the CPU 1 1 and the CPU 1 4 1 will include the authentication information of itself and the identification information of the authorized key of the input object (for example, the content name that can be decoded by the key). The authorization key transmission instruction for the authorization key input is transmitted to the memory card 30 (S 2 0 2) connected to the card connection device 20. If the C P U of the memory card 30 obtains the authorization key for the authorization key input and transmits the instruction, the authentication data included in the instruction is used for verification (S 2 0 0 3). For example, it is investigated whether or not it is shown that the authentication data is registered in advance on the key storage device of this memory card 30. Furthermore, if it is authenticated that the transmission source of the instruction is a key storage-dedicated device 14 (in the case of S 2 04, Yes), it is investigated whether a specific authorized key is stored by the identification information included in the instruction. Within the memory card 30 (printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economy S 2 0 5). If it is stored (in the case of Yes in S2006), the authorization key is read out, and encrypted communication is used to transmit the key storage dedicated device 14 of the instruction transmission source (S2008). After that, the memory card 30 deletes the transmission authorization key (S 2 0 9). Further, in S 2 0 0 4, in a case where the transmission source of the unauthentication instruction is a key storage dedicated device 14, and in S 2 0 6, a desired authorized key is not stored in the memory card 3 0 Within the circumstances, the paper size of the memory card is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -17- 515950 A7 B7_ V. Description of the invention (15) The CPU of 30 conveys this intention to CPU11. Accept this, (Please read the precautions on the back before filling in this page) C P U 1 1 Display the error on the display device 17 and perform the specified error processing (S2007). It is to be noted that the key storage dedicated device 14 for transmitting the authorization key for transmitting the authorization key input instruction C C 储存 1 4 1 If the memory card 30 connected to the card connection device 20 obtains the authorization key, it is given, for example, The content name corresponding to the content data that can be decoded by the key is stored in the flash memory 143 (S2010). Next, an example of data exchange between the key storage dedicated device 14 and the memory card 30 in the flow shown in FIG. 8 will be described. FIG. 9 is a sequence diagram illustrating an example of data exchange between the key storage dedicated device 14 and the memory card 30 in the flow shown in FIG. 8. Key storage dedicated device C 4 1-4 1 in S 2 0 0 2 of FIG. 8 includes: authentication information of itself, identification information of authorized key of input object, and media level password key held in advance KK'P MC: Paired media level public key KK '. Μ. The authorization key transmission instruction is transmitted to the memory card 3 0 (T 2 0 0 1). Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs to accept this. The CPU of the memory card 30 is authenticated by the key storage device 14 in S 2 0 0 4 to S 2 0 0 7 and is required. Confirmation that the authorization key is stored in the memory card 30 (T 2 0 2). After that, the CPU of the memory card 30 generates a session key K s 1 (T 2 0 3) and uses the media level public key K, which is included in the authorization key transmission instruction. It is encrypted and transmitted to the key storage dedicated device 14 (T2004) of the transmission source of the instruction. This paper size applies to Chinese National Standard (CNS) Α4 specification (210X29 * 7mm) -18- 515950 Α7 Β7 V. Description of the invention (16) (Please read the precautions on the back before filling this page) Accept this, click to save The CPU 141 of the dedicated device 14 decodes the encrypted session key K s 1 with the media level secret key K ′ PM c held in advance, and obtains the session key κ s 1 (T 2 0 〇 5). After that, a random number K s 2 (τ 2 0 6) is generated, and the session key K s 1 is used to encrypt the key K s 1 and the media-specific secret key K ′ M that is held in advance and the paired media fixed public key K ′. μ is transmitted to the memory card 3 0 (T 2 0 7). Accepting this, the CPU of the memory card 30 decodes the encrypted random number K s 2 and the media-level unique public key κ, with the session key κ s 1, and obtains the random number K s 2 and the media-specific public key κ ′ ◦ μ (τ 2 0 0 8). Furthermore, the authorized key K c requested to be transmitted is encrypted with the media-specific public key ′ MC, and further encrypted with a random number κ ′ s 2 and transmitted to the key storage dedicated device 1 4 (which is the transmission source of the authorized key transmission instruction) Τ2 0 〇9) 〇Accept this, the key storage dedicated device 1 4 of c PU 1 4 1 uses the random number K s 2 and the media-specific secret key κ 'ρ μ to decode the encrypted authorization key K c to obtain the authorization key K c (T 2 0 1 0). The above describes the operation of obtaining the authorized key from the memory card 30. It is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Next, the authorized key stored in the key storage dedicated device 14 of the content reproduction device will be explained to the memory. Action when the body card 30 moves. Fig. 10 is a flowchart for explaining the operation of the key storage dedicated device 14 of the content reproduction device to which this embodiment is applied to the case where the memory card 30 connected to the content reproduction device moves the authorization key. This process is, for example, in the state that the memory card 30 is installed in the content reproduction device, and the user's paper size applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm) -19- 515950 A7 B7 V. Description of the invention (17 ) (Please read the precautions on the back before filling in this page) Using the input device 16 from the list of content names corresponding to the authorized keys stored in the key storage dedicated device 14 displayed on the display device 17, The content of the authorization key corresponding to the moving object is selected, and an input of the authorization key movement instruction is started. First, the cPU 1 1 accepts the authorization key movement instruction by the user through the input device 16 and transmits the intention to the memory card 30. The memory card of the authorized key movement instruction obtained by the CPU 1 1 30 and the CPU of the memory key 30 includes its own authentication data and the identification information of the authorized key of the moving object (for example, the content name that can be decoded by the key). The authorized key transmission instruction is transmitted to the key storage dedicated device 1 4 (s 3 〇 0 2) ° The key storage dedicated device 14 4 c PU 1 4 1 If the authorized key transmission instruction for the authorized key movement is obtained, use the included in the The certification information as instructed is verified (S 3 0 0 3). For example, it is checked whether the authentication data is registered in advance in the memory card 30 of the key storage dedicated device 14. Also, if it is verified that the transmission source of the instruction is a memory card 30 (the situation of Ye s printed by S3004, the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs), the investigation is specified by the identification information included in the instruction. Whether the authorization key is stored in the flash memory 143 (S3005). If it is stored (in the case of Y e s in S3006), read the authorization key, and use encrypted communication to transmit to the memory card 3 0 (S 3 0 0 8) of the transmission source of the instruction. After that, the authorized key for transmission (S 3 0 0) was deleted from the flash memory 1 4 3 °. In S 3 0 0, the transmission source that could not be authenticated is based on the Chinese paper standard ( CNS) A4 specifications (210X: 297 public directors) -20- 515950 A7 B7 _ V. Description of the invention (18) (Please read the precautions on the back before filling this page) The situation of the memory card 3 0, and the s 3 In 2006, if the desired authorized key is not stored in the flash memory 143, the CPU 141 of the key storage dedicated device 14 conveys this intention to the CPU 111. In response to this, C P U 1 1 performs an error display or the like on the display device 17 and performs a designated error process (S 3 07). In addition, if the CPU of the memory card 30 for transmitting the authorization key transmission instruction for transmitting the authorization key is accepted by the key storage dedicated device 14, the authorization key is assigned to the content name corresponding to the content data that can be decoded by the key, for example , Stored in the memory card 30 (S 3 0 10). In addition, the data exchange between the key storage dedicated device 14 and the memory card 30 in the flow shown in FIG. 10 is shown in the sequence diagram shown in FIG. 9. The key storage dedicated device 14 and the memory card 3 are exchanged. If the action of 0 is replaced by each other. 0 The above explains the action of moving the authorization key of the Billion Card 30. It is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs and uses the mobile phone connected to the communication device 15. In the case of a type telephone, the operation of obtaining an authorization key from a content distribution center (not shown) through an online system or the Internet can generally be the same as a downloader via the Internet. However, in order that only authorized persons can obtain an authorized key, an authentication process is performed between the key storage dedicated device 14 and the content distribution center, so that only the content distribution center authenticates the key storage dedicated device 14 to make it It is better to download the license key. In addition, downloading of the content data to the content storage device 13 can copy, for example, the content data stored in the memory card 30 to be stored in the content storage device. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm). ) -21-515950 A7 B7 V. Description of the invention (19) (Please read the notes on the back before filling out this page) 1 3, or use the mobile phone / placement type telephone connected to the communication device 15 through the online system Networks such as the Internet or the Internet are obtained from a content distribution center (not shown) and stored in a content storage device 1 3. In any case, the content data is encrypted. Without the corresponding authorization key, it cannot be decoded or reproduced. The above is a description of one embodiment of the present invention. In this embodiment, because the content data stored in the content storage device 13 is encrypted, it cannot be decoded or reproduced without the corresponding authorization key. Therefore, because the copy storage function is provided with a special function in the content storage device 13, it is possible to use a large-capacity hard disk device or the like which is generally commercially available as the content storage device 13. Therefore, a large amount of content data can be stored. In addition, in order to decode the content data stored in the content storage device 13, a corresponding authorization key is required. This authorization key cannot be stored in the key storage dedicated device 14 and cannot be reproduced. Content information. Therefore, it is possible to permit reproduction of content data only to legitimate rights holders (those with corresponding authorized keys), and it is possible to seek protection of content authors and the like. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Further, in this embodiment, the audio reproduction device 18 / video reproduction device 19 that reproduces the content data is used to decode the encrypted content data. Further, in the case where the key storage dedicated device 14 authenticates that the opponent of the authorized key transmission is the audio reproduction device 18 / video reproduction device 19, the encrypted key is transmitted to the audio reproduction device 1 8 / video reproduction device 19 using encrypted communication. . In this way, the possibility of the authorization key leaking to the outside can be reduced, and the security can be improved. 1 The paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) -22-515950 A7 B7 _ V. Description of the invention (2〇) (Please read the precautions on the back before filling this page) In addition, In this embodiment, the key storage dedicated device 14 deletes the transferred authorization key from the memory content of the key storage dedicated device 14 when the transfer key of the authorized key is the memory card 30. That is, the key storage dedicated device 14 is provided with a copy prevention function of the authorized key. By doing so, the possibility of unauthorized copying of the authorization key can be reduced. In addition, the data size of the general key is significantly smaller than the data size of the encrypted content data. Therefore, even if the flash memory 1 4 3 constitutes the memory portion of the key storage dedicated device 14, many authorized keys can be stored in the flash memory 1 4 3. Therefore, it is possible to provide a content reproduction device of the placement type suitable for the reproduction of content data at home. Furthermore, the present invention is not limited to the above-mentioned embodiment, and various modifications can be made within the scope of the gist thereof. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. For example, in the above-mentioned embodiment, for example, the encrypted content data is stored in a content storage device 13 composed of a memory device such as a hard disk device. Instructions. However, the present invention is not limited to this. Encrypted content data can also be provided in the form of removable storage media such as D V D or CD. In this case, in this embodiment, instead of the content storage device 13, a device for reading encrypted content data from a storage medium having the aforementioned portability may be provided. Further, in the above-mentioned embodiment, the key storage dedicated device 14 may be freely constructed by the device. For example, as the key storage-dedicated device 14, a memory card 30 can be used, and it can be mounted on the card connection device 20. Or set a dedicated storage slot for key storage special device 14 in this content reproduction device, here the paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) '" -23- 515950 A7 B7 V. Description of the invention (21) The slot device key storage dedicated device 14 can be used. As mentioned above, the data size of the key is significantly smaller than the data size of the encrypted content data, and many authorized keys can be stored in the key storage dedicated device 14. Therefore, it is possible to prevent frequent occurrence of the situation where the key storage dedicated device 14 must be replaced when changing the content of reproduction. Therefore, it is possible to provide a placement-type content reproduction device suitable for reproduction of content data at home. Furthermore, in the embodiment described above, the authorization key is prepared for each encrypted content data, but the present invention is not limited to this. For example, consider a plurality of encrypted content data as one group, and each group is ready to decode an authorized key for the encrypted content data belonging to the group. As described above, according to the present invention, while protecting the content author, it is possible to reproduce a large amount of content data without requiring replacement of a memory card. (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 24-