CN104253689A - User identity module card generated dynamic password authentication method and system based on QR (quick response) code - Google Patents
User identity module card generated dynamic password authentication method and system based on QR (quick response) code Download PDFInfo
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- CN104253689A CN104253689A CN201310265164.2A CN201310265164A CN104253689A CN 104253689 A CN104253689 A CN 104253689A CN 201310265164 A CN201310265164 A CN 201310265164A CN 104253689 A CN104253689 A CN 104253689A
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Abstract
The invention discloses a user identity module card generated dynamic password authentication method and system based on the QR (quick response) code. The method includes the steps: a server of a business application responds to a received authentication request to use the application and acquires a QR code, including at least one of user identity information, business information, authentication information, via a QR code encoding algorithm; the QR code is displayed to a user; a mobile terminal acquires QR code information via a scanner and transmits the same to a safety application unit; the safety application unit transmits the QR code information to a user identity module card coupled to the mobile terminal; the user identity module card generates a dynamic password according to the QR code information and returns the dynamic password to the safety application unit so that the dynamic password is transmitted to the server of the business application for authentication; in response to the fact that authentication is passed, the server provides the user with business services through an application page. The method and the system according to the technical scheme have the advantages that safer and more convenient authentication interaction of user identity module card generated dynamic passwords is provided.
Description
Technical field
The present invention relates to the communications field, particularly a kind of subscriber card verifying dynamic password method and system based on Quick Response Code.
Background technology
Along with the development of terminal technology, use mobile Internet application more and more general by mobile phone.Meanwhile, the data security of user is also paid attention to day by day.Dynamic password is a kind of main flow means protecting mobile Internet information security just.The method generates uncertain by special algorithm and usually can only expendable random digit combine as dynamic password.
Dynamic password can generate dynamic password by mobile phone client software token, also can block generation by cellphone subscriber, is generated and provide dynamic password more safer than mobile phone client software token generation password by subscriber card.
As shown in Figure 1, Fig. 1 illustrates the use schematic flow sheet of dynamic password in prior art.In Fig. 1, use 189 mailbox for user, user also needs further dynamic password authentication after utilizing cell-phone number and the application of default password logon 189 mailbox:
User needs to use the application of UIM card, and therefore, user puts the dynamic password in the application of UIM card; Then user clicks 189 mailbox buttons, obtains the dynamic password for 189 mailbox; Acquisition is the dynamic password that 189 mailbox generate; Afterwards, user manually inputs this dynamic password, and presses submit button;
Obtain in response to this dynamic password and be verified, user by obtaining corresponding business tine in the 189 mailbox application pages.
As can be seen here, in the actual use of above-mentioned dynamic password, for dynamic password is submitted to application server, user is needed repeatedly to click menu item, and the dynamic password of input of character string form is moved at application page left-hand seat, the input of user is more loaded down with trivial details, and experience is poor.Meanwhile, easily intercepted by keyboard wooden horse in dynamic password manual input process yet and steal, reliability and fail safe are not strong.
Summary of the invention
According to an aspect of the embodiment of the present invention, a technical problem to be solved is: provide a kind of subscriber card verifying dynamic password method and system based on Quick Response Code, to provide more convenient safer subscriber card verifying dynamic password mutual.
A kind of subscriber card verifying dynamic password method based on Quick Response Code that the embodiment of the present invention provides, comprising:
The server of service application is in response to the checking request receiving the use business that mobile terminal sends, utilize Quick Response Code encryption algorithm, the operation of Quick Response Code coded treatment is carried out to described checking request, obtain Quick Response Code, the 2 D code information that Quick Response Code is corresponding comprises at least one in the identity information of described user, business information, checking solicited message;
By the application page of described service application, to Quick Response Code described in user's output display;
Mobile terminal utilizes scanning means to perform the operation of Quick Response Code scanning recognition, obtains 2 D code information, the safety applications unit sent to;
Described 2 D code information is transferred to coupling subscriber card in the terminal by safety applications unit;
Described subscriber card, according to the dynamic password generating algorithm preset, generates dynamic password based on described 2 D code information;
Obtained dynamic password is returned to described safety applications unit by described subscriber card;
Described dynamic password is sent to the server of described service application by described safety applications unit, and described server is verified described dynamic password;
Pass in response to checking, described server provides business service by the application page for described user.
Alternatively, described 2 D code information also comprises the dynamic factor that described server produces;
Described based on described 2 D code information generation dynamic password, specifically comprise:
Dynamic password is generated based on the dynamic factor in described 2 D code information.
Alternatively, after generating dynamic password, also comprise:
Dynamic password described in the encrypted private key that described subscriber card utilizes described subscriber card;
The PKI of subscriber card described in described server by utilizing is decrypted the dynamic password after encryption, after obtaining described dynamic password, performs described verification operation.
Alternatively, described safety applications unit is undertaken by open mobile api interface and described subscriber card alternately.
Alternatively, described server is verified described dynamic password, comprising:
Described server, according to described dynamic password generating algorithm, utilizes at least one in the identity information of described user accordingly, business information, checking solicited message, generates checking dynamic password;
Identify that whether described checking password is consistent with the dynamic password that safety applications unit sends, in response to unanimously, then verify and pass.
A kind of subscriber card verifying dynamic password system based on Quick Response Code that the embodiment of the present invention provides, comprising:
The server of service application, for in response to the checking request of use business receiving mobile terminal and send, utilize Quick Response Code encryption algorithm, the operation of Quick Response Code coded treatment is carried out to described checking request, obtain Quick Response Code, the 2 D code information that Quick Response Code is corresponding comprises at least one in the identity information of described user, business information, checking solicited message; The dynamic password that safety applications unit returns is verified; Pass in response to checking, by the application page for described user provides business service;
The application page display unit of service application, for Quick Response Code described in user's output display;
The scanning means of mobile terminal, for performing the operation of Quick Response Code scanning recognition, obtains 2 D code information, the safety applications unit sent to;
Safety applications unit, for being transferred to coupling subscriber card in the terminal by described 2 D code information; Dynamic password is sent to the server of described service application;
Subscriber card, for according to the dynamic password generating algorithm preset, generates dynamic password based on described 2 D code information; Obtained dynamic password is returned to described safety applications unit.
Alternatively, described 2 D code information also comprises the dynamic factor that described server produces;
Described subscriber card, specifically for generating dynamic password based on the dynamic factor in described 2 D code information.
Alternatively, described subscriber card, also for after generating dynamic password, dynamic password described in the encrypted private key utilizing described subscriber card;
Described server, also for utilizing the PKI of described subscriber card to be decrypted the dynamic password after encryption, after obtaining described dynamic password, performs described verification operation.
Alternatively, described safety applications unit is undertaken by open mobile api interface and described subscriber card alternately.
Alternatively, described server, specifically for according to described dynamic password generating algorithm, utilizes at least one in the identity information of described user accordingly, business information, checking solicited message, generates checking dynamic password; Identify that whether described checking password is consistent with the dynamic password that safety applications unit sends, in response to unanimously, then verify and pass.
Based on the subscriber card verifying dynamic password method and system based on Quick Response Code that the above embodiment of the present invention provides, by carrying out the operation of Quick Response Code coded treatment to checking request, utilize scanning means to perform Quick Response Code scanning recognition operation automatic acquisition 2 D code information, and be transferred to coupling subscriber card in the terminal by safety applications unit.Afterwards, subscriber card generates dynamic password based on 2 D code information, and dynamic password is returned to safety applications unit and verify to send to the server of service application.Procedure described above avoid user repeatedly to click and manually input dynamic password and carry out the step verified, reduce the operation of manual input.Meanwhile, dynamic password is generated by subscriber card, realizes the dynamic password of hardware-level, thus obtains higher safety guarantee, reduces the dangerous risk that software token generates password.Thus, more convenient safer subscriber card verifying dynamic password reciprocal process is provided.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present invention, further feature of the present invention and advantage thereof will become clear.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Meanwhile, it should be understood that for convenience of description, the size of the various piece shown in accompanying drawing is not draw according to the proportionate relationship of reality.Represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
What form a part for specification drawings describes embodiments of the invention, and together with the description for explaining principle of the present invention.
With reference to accompanying drawing, according to detailed description below, clearly the present invention can be understood, wherein:
Fig. 1 illustrates the interaction flow schematic diagram of verifying dynamic password of the prior art;
Fig. 2 illustrates the schematic flow sheet of a kind of embodiment of subscriber card verifying dynamic password method based on Quick Response Code provided by the present invention;
Fig. 3 illustrates the interaction flow schematic diagram of verifying dynamic password provided by the present invention;
Fig. 4 illustrates the structural representation of a kind of embodiment of subscriber card verifying dynamic password system based on Quick Response Code provided by the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.It should be noted that: unless specifically stated otherwise, otherwise the parts of setting forth in these embodiments and the positioned opposite of step do not limit the scope of the invention.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part of authorizing specification.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
Subscriber card in following embodiment can be subscriber identification module (User Identity Module, UIM) block, also can be client identification module (Subscriber Identity Module, SIM) subscriber card such as card or Global Subscriber identification (Universal Subscriber Identity Module, USIM) card.
Shown in Figure 2, Fig. 2 illustrates the schematic flow sheet of a kind of embodiment of subscriber card verifying dynamic password method based on Quick Response Code provided by the present invention.The method comprises:
201, the server of service application is in response to the checking request receiving the use business that mobile terminal sends, utilize Quick Response Code encryption algorithm, the operation of Quick Response Code coded treatment is carried out to checking request, obtain Quick Response Code, the 2 D code information that Quick Response Code is corresponding comprises at least one in the identity information of user, business information, checking solicited message;
202, by the application page of service application, to user's output display Quick Response Code;
203, mobile terminal utilizes scanning means to perform the operation of Quick Response Code scanning recognition, obtains 2 D code information, the safety applications unit sent to; Device mobile phone such as, with camera-shooting scanning function performs the operation of Quick Response Code scanning recognition;
204,2 D code information is transferred to coupling subscriber card in the terminal by safety applications unit;
205, subscriber card, according to the dynamic password generating algorithm preset, generates dynamic password based on 2 D code information;
206, obtained dynamic password is returned to safety applications unit by subscriber card;
207, dynamic password is sent to the server of service application by safety applications unit, and server is verified dynamic password;
208, pass in response to checking, server provides business service by the application page for user.
Shown in Figure 3, Fig. 3 shows the use schematic flow sheet of dynamic password of the present invention.
Still 189 mailbox are used for user, after user utilizes cell-phone number and the application of default password logon 189 mailbox, the server of 189 mailbox is in response to the checking request receiving the use business that mobile terminal sends, utilize Quick Response Code encryption algorithm, the operation of Quick Response Code coded treatment is carried out to checking request, obtain Quick Response Code, the 2 D code information that Quick Response Code is corresponding comprises at least one in the identity information of user, business information, checking solicited message;
By the application page of service application, to user's output display Quick Response Code; User can perform the operation of Quick Response Code scanning recognition by the scanning means of mobile terminal, obtain 2 D code information, the safety applications unit sent to by Quick Response Code afterwards and be transferred to subscriber card and obtain the server that dynamic password to dynamic password returns service application and all automatically complete, is verified the rear inbox automatically proceeding to 189 mailbox.
Visible, procedure described above avoid user and repeatedly click and manually input dynamic password and carry out the step verified, the risk of password is usurped in the operation reducing manual input by reducing keyboard wooden horse.Meanwhile, dynamic password is generated by subscriber card, and the dynamic password realizing hardware-level obtains higher safety guarantee, reduces the dangerous risk that software token generates password.Thus provide more convenient safer subscriber card verifying dynamic password reciprocal process.
Quick Response Code well known to those skilled in the art (2D barcode) Encoding and Decoding can be adopted to realize above-mentioned flow process.Quick Response Code utilizes specific geometric figure according to certain rules in the chequered with black and white graphic recording data symbol information that plane (two-dimensional directional) distributes.Coding utilizes the concept of bit stream, and the geometrical body using several corresponding with binary system, to represent word numerical information, can realize information by image input device or photoelectric scanning device automatically identifying and reading and automatically process.The features such as Quick Response Code has high density coding, information capacity is large, coding range is wide, open ended information is higher than common bar code tens times.
2 D code information of the present invention can comprise the identity information (or account) of family user, user, and just authentication result (i.e. first time log in authentication result), the service application information of being correlated with is (such as, the type of business, Business Name), checking request kind, dynamic password generate the factor (such as, time or challenge code), also can be the information that other can be used for verifying.
According to a concrete example of the inventive method embodiment, 2 D code information also comprises the dynamic factor that server produces; Subscriber card generates dynamic password based on 2 D code information, specifically can comprise: generate dynamic password based on the dynamic factor in 2 D code information.Dynamic factor can be random number or current temporal information.
According to a concrete example of the inventive method embodiment, after subscriber card generates dynamic password, can also comprise: subscriber card utilizes the encrypted private key dynamic password of subscriber card; The PKI of server by utilizing subscriber card is decrypted the dynamic password after encryption, after obtaining dynamic password, performs verification operation.By encrypted transmission dynamic password, further provide the fail safe of dynamic password.
According to a concrete example of the inventive method embodiment, wherein, safety applications unit is by open mobile API(Open Mobile API) interface and subscriber card carry out alternately.SIM alliance organizes the Open Mobile API proposed to make mobile phone apply the various different security module can accessed in mobile phone.Directly dynamic password is generated by subscriber card, again by safety applications unit (such as, safety applications software App) and subscriber card by Open Mobile API machine card interface mutual, and the server being automatically submitted to service application by safety applications unit is verified on backstage, avoids password obtained by malice such as phishings and cause the safety problem usurped.
According to a concrete example of the inventive method embodiment, wherein, server is verified dynamic password, comprising: server is according to dynamic password generating algorithm, utilize at least one in the identity information of user accordingly, business information, checking solicited message, generate checking dynamic password; Identify that whether checking password is consistent with the dynamic password that safety applications unit sends, in response to unanimously, then verify and pass.
Shown in Figure 4, Fig. 4 illustrates the structural representation of a kind of embodiment of subscriber card verifying dynamic password system based on Quick Response Code provided by the present invention.This system comprises:
The server 401 of service application, for in response to the checking request of use business receiving mobile terminal and send, utilize Quick Response Code encryption algorithm, the operation of Quick Response Code coded treatment is carried out to checking request, obtain Quick Response Code, the 2 D code information that Quick Response Code is corresponding comprises at least one in the identity information of user, business information, checking solicited message; The dynamic password that safety applications unit returns is verified; Pass in response to checking, by the application page for user provides business service;
The application page display unit 402 of service application, for user's output display Quick Response Code;
The scanning means 403 of mobile terminal, for performing the operation of Quick Response Code scanning recognition, obtains 2 D code information, the safety applications unit sent to;
Safety applications unit 404, for being transferred to coupling subscriber card in the terminal by 2 D code information; Dynamic password is sent to the server of service application;
Subscriber card 405, for according to the dynamic password generating algorithm preset, generates dynamic password based on 2 D code information; Obtained dynamic password is returned to safety applications unit.
Wherein, the server 401 of service application can be arranged on far-end backstage, and the application page display unit 402 of service application can be arranged on user side, and scanning means 403, safety applications unit 404 can be arranged on mobile terminal with subscriber card 405.
A concrete example of system according to the invention embodiment, 2 D code information also comprises the dynamic factor that server produces; Subscriber card 405, specifically for generating dynamic password based on the dynamic factor in 2 D code information.
A concrete example of system according to the invention embodiment, subscriber card 405 also for after generating dynamic password, utilizes the encrypted private key dynamic password of subscriber card;
The server 401 of service application, also for utilizing the PKI of subscriber card to be decrypted the dynamic password after encryption, after obtaining dynamic password, performs verification operation.
A concrete example of system according to the invention embodiment, safety applications unit 404 is undertaken by open mobile api interface and subscriber card 405 alternately.
A concrete example of system according to the invention embodiment, the server 401 of service application is specifically for according to dynamic password generating algorithm, utilize at least one in the identity information of user accordingly, business information, checking solicited message, generate checking dynamic password; Identify that whether checking password is consistent with the dynamic password that safety applications unit sends, in response to unanimously, then verify and pass.
Technical scheme provided by the present invention, checking request and application message are directly resolved by Quick Response Code and are obtained, and reduce user and input number of times, thus reduce the risk that password usurped by keyboard wooden horse; Directly generated by subscriber card that dynamic password, safety applications unit and subscriber card are mutual by Open Mobile API machine card interface, safety applications unit is automatically submitted to application backstage and verifies, avoid password to be obtained by malice such as phishings and the safety problem that causes dynamic password to usurp.
So far, described in detail according to a kind of subscriber card verifying dynamic password method and system based on Quick Response Code of the present invention.In order to avoid covering design of the present invention, details more known in the field are not described.Those skilled in the art, according to description above, can understand how to implement technical scheme disclosed herein completely.
In this specification, each embodiment all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, same or analogous part cross-reference between each embodiment.For the subscriber card verifying dynamic password system embodiment based on Quick Response Code, because itself and embodiment of the method are substantially corresponding, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
The subscriber card verifying dynamic password method and system based on Quick Response Code of the present invention may be realized in many ways.Such as, any combination by software, hardware, firmware or software, hardware, firmware realizes the subscriber card verifying dynamic password method and system based on Quick Response Code of the present invention.Said sequence for the step of described method is only to be described, and the step of method of the present invention is not limited to above specifically described order, unless specifically stated otherwise.In addition, in certain embodiments, can be also record program in the recording medium by the invention process, these programs comprise the machine readable instructions for realizing according to method of the present invention.Thus, the present invention also covers the recording medium stored for performing the program according to method of the present invention.
Although be described in detail specific embodiments more of the present invention by example, it should be appreciated by those skilled in the art, above example is only to be described, instead of in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can without departing from the scope and spirit of the present invention, above embodiment be modified.Scope of the present invention is limited by claims.
Claims (10)
1., based on a subscriber card verifying dynamic password method for Quick Response Code, comprising:
The server of service application is in response to the checking request receiving the use business that mobile terminal sends, utilize Quick Response Code encryption algorithm, the operation of Quick Response Code coded treatment is carried out to described checking request, obtain Quick Response Code, the 2 D code information that Quick Response Code is corresponding comprises at least one in the identity information of described user, business information, checking solicited message;
By the application page of described service application, to Quick Response Code described in user's output display;
Mobile terminal utilizes scanning means to perform the operation of Quick Response Code scanning recognition, obtains 2 D code information, sends to safety applications unit;
Described 2 D code information is transferred to coupling subscriber card in the terminal by safety applications unit;
Described subscriber card, according to the dynamic password generating algorithm preset, generates dynamic password based on described 2 D code information;
Obtained dynamic password is returned to described safety applications unit by described subscriber card;
Described dynamic password is sent to the server of described service application by described safety applications unit, and described server is verified described dynamic password;
Pass in response to checking, described server provides business service by the application page for described user.
2. method according to claim 1, wherein, described 2 D code information also comprises the dynamic factor that described server produces;
Described based on described 2 D code information generation dynamic password, specifically comprise:
Dynamic password is generated based on the dynamic factor in described 2 D code information.
3. method according to claim 1, after generating dynamic password, also comprises:
Dynamic password described in the encrypted private key that described subscriber card utilizes described subscriber card;
The PKI of subscriber card described in described server by utilizing is decrypted the dynamic password after encryption, after obtaining described dynamic password, performs described verification operation.
4. method according to claim 1, wherein, described safety applications unit is undertaken by open mobile api interface and described subscriber card alternately.
5. method according to claim 1, wherein, described server is verified described dynamic password, comprising:
Described server, according to described dynamic password generating algorithm, utilizes at least one in the identity information of described user accordingly, business information, checking solicited message, generates checking dynamic password;
Identify that whether described checking password is consistent with the dynamic password that safety applications unit sends, in response to unanimously, then verify and pass.
6., based on a subscriber card verifying dynamic password system for Quick Response Code, comprising:
The server of service application, for in response to the checking request of use business receiving mobile terminal and send, utilize Quick Response Code encryption algorithm, the operation of Quick Response Code coded treatment is carried out to described checking request, obtain Quick Response Code, the 2 D code information that Quick Response Code is corresponding comprises at least one in the identity information of described user, business information, checking solicited message; The dynamic password that safety applications unit returns is verified; Pass in response to checking, by the application page for described user provides business service;
The application page display unit of service application, for Quick Response Code described in user's output display;
The scanning means of mobile terminal, for performing the operation of Quick Response Code scanning recognition, obtains 2 D code information, the safety applications unit sent to;
Safety applications unit, for being transferred to coupling subscriber card in the terminal by described 2 D code information; Dynamic password is sent to the server of described service application;
Subscriber card, for according to the dynamic password generating algorithm preset, generates dynamic password based on described 2 D code information; Obtained dynamic password is returned to described safety applications unit.
7. system according to claim 6, wherein, described 2 D code information also comprises the dynamic factor that described server produces;
Described subscriber card, specifically for generating dynamic password based on the dynamic factor in described 2 D code information.
8. system according to claim 6, wherein, described subscriber card, also for after generating dynamic password, dynamic password described in the encrypted private key utilizing described subscriber card;
The server of described service application, also for utilizing the PKI of described subscriber card to be decrypted the dynamic password after encryption, after obtaining described dynamic password, performs described verification operation.
9. system according to claim 6, wherein, described safety applications unit is undertaken by open mobile api interface and described subscriber card alternately.
10. system according to claim 6, wherein, the server of described service application, specifically for according to described dynamic password generating algorithm, utilize at least one in the identity information of described user accordingly, business information, checking solicited message, generate checking dynamic password; Identify that whether described checking password is consistent with the dynamic password that safety applications unit sends, in response to unanimously, then verify and pass.
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| CN105488553A (en) * | 2016-01-25 | 2016-04-13 | 四川虹慧云商科技有限公司 | Two-dimensional code support system |
| CN107016420A (en) * | 2016-12-08 | 2017-08-04 | 阿里巴巴集团控股有限公司 | A kind of method for processing business and device |
| CN108710699A (en) * | 2018-05-23 | 2018-10-26 | 陈达康 | Dynamic password formation method, apparatus and system |
| CN112488694A (en) * | 2018-09-13 | 2021-03-12 | 创新先进技术有限公司 | Code scanning control method, device and system |
| CN109548002B (en) * | 2018-12-12 | 2022-02-08 | 南京友众力信息技术有限公司 | Authorization method for controlling functions of SIM card of mobile phone |
| CN109548002A (en) * | 2018-12-12 | 2019-03-29 | 南京友众力信息技术有限公司 | It is a kind of for controlling the authorization method of SIM cards of mobile phones function |
| CN111144875A (en) * | 2019-11-30 | 2020-05-12 | 飞天诚信科技股份有限公司 | Terminal equipment and working method thereof |
| CN111144875B (en) * | 2019-11-30 | 2023-04-18 | 飞天诚信科技股份有限公司 | Terminal equipment and working method thereof |
| CN112788046A (en) * | 2021-01-22 | 2021-05-11 | 中信银行股份有限公司 | Method and system for encrypting transmission information |
| CN114373257A (en) * | 2021-12-21 | 2022-04-19 | 日立楼宇技术（广州）有限公司 | Card for calling elevator by visitor, and calling elevator system, calling elevator method and calling elevator device |
| CN114373257B (en) * | 2021-12-21 | 2023-06-20 | 日立楼宇技术（广州）有限公司 | Card for calling elevator by visitor, elevator calling system, method and device |
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