CN101888628A - Mobile multimedia broadcasting system and encryption method employed by same - Google Patents
Mobile multimedia broadcasting system and encryption method employed by same Download PDFInfo
- Publication number
- CN101888628A CN101888628A CN2009101073649A CN200910107364A CN101888628A CN 101888628 A CN101888628 A CN 101888628A CN 2009101073649 A CN2009101073649 A CN 2009101073649A CN 200910107364 A CN200910107364 A CN 200910107364A CN 101888628 A CN101888628 A CN 101888628A
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- key
- mobile multimedia
- multimedia broadcasting
- terminal
- request
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
- H04L9/0822—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using key encryption key
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
- H04W12/041—Key generation or derivation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/80—Wireless
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2463/00—Additional details relating to network architectures or network communication protocols for network security covered by H04L63/00
- H04L2463/062—Additional details relating to network architectures or network communication protocols for network security covered by H04L63/00 applying encryption of the keys
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephonic Communication Services (AREA)
Abstract
The invention discloses a system and a method for encrypting a service key by using a user key when a user terminal is roaming in a mobile multimedia broadcasting service system. The method comprises the following steps of: a mobile multimedia broadcasting service platform of a terminal visit area requests an encryption service key from a mobile multimedia broadcasting service platform of a terminal attaching area; after detecting the service key according to the encryption service key request, the mobile multimedia broadcasting service platform of the terminal attaching area encrypts the service key by using a corresponding user key; and the mobile multimedia broadcasting service platform of the terminal attaching area sends the encrypted service key to the mobile multimedia broadcasting service platform of the terminal visit area. The method avoids information leakage risks caused by transmitting the user key to a mobile multimedia broadcasting service platform beyond the attaching area.
Description
Technical field
The present invention relates to mobile multimedia broadcasting service system, relate in particular to the encryption method of mobile multimedia broadcast system and use thereof, specifically, the present invention relates to when the user roams, use in the mobile multimedia broadcasting service system method and apparatus of user key secure service key.
Background technology
Fig. 1 shows a kind of system configuration of mobile multimedia broadcast system.The dependency structure of system when for convenience of description, only showing terminal roaming here.This system comprises China Mobile multimedia broadcasting network business platform (China Mobile Multimedia Broadcasting is hereinafter to be referred as CMMB) and mobile communication network service platform; Mobile multimedia broadcast system can be to include only the CMMB network business platform.
The CMMB network business platform comprises: the mobile multimedia broadcasting service platform that the each province has, economize mobile multimedia broadcasting service platform (A among Fig. 1 economizes the Mobile Multimedia Broadcasting platform) etc. as Mobile Multimedia Broadcasting user roaming place province mobile multimedia broadcasting service platform (B among Fig. 1 economizes the Mobile Multimedia Broadcasting platform), Mobile Multimedia Broadcasting user attaching; Economize business platform and can comprise that districts and cities' platform is some, economizing as B among Fig. 1 has 2 on districts and cities' Mobile Multimedia Broadcasting platform; Whole nation Mobile Multimedia Broadcasting platform.Terminal seat B economizes Mobile Multimedia Broadcasting platform and each Mobile Multimedia Broadcasting platform, gets in touch by interfaces such as business cipher key sync cap, business cipher key encipher interfaces.
Mobile communication network service platform comprises: each province's mobile communication network service platform, B province mobile communication platform is province's mobile communication service platform of mobile subscriber roaming place as shown in Figure 1.Mobile communication network service platform can be a Co., Ltd of China Mobile, also can be mobile network's business platform of other mobile operator.
The Mobile Multimedia Broadcasting platform can be managed program by oneself, also can relay prefectures and cities, he economizes, the program of national platform.Therefore, the business cipher key of visit ground Mobile Multimedia Broadcasting platform can derive from this locality, institute jurisdiction city, his province, national platform.
After producing, the condition receiving system (Conditional Access System is hereinafter to be referred as CAS) of business cipher key by program source place mobile multimedia broadcasting service platform be issued to terminal.At the mobile multimedia broadcast system of CMMB shown in Figure 1 and mobile communication network fusion, business cipher key need be economized platform by Mobile Multimedia Broadcasting visit ground province's platform and mobile network with visiting and be handed down to terminal.
When the terminal use used ciphered program, terminal need obtain business cipher key from network side.Because the needs of fail safe, this business cipher key need to use the user key secure service key of Mobile Multimedia Broadcasting before Mobile Multimedia Broadcasting visit ground province platform is issued to terminal.
But, user profile such as user key are kept at the Mobile Multimedia Broadcasting of user ascription area and economize platform, send user key information to other system, the Mobile Multimedia Broadcasting that promptly sends this ownership to is economized visit ground system outside the platform and is carried out business cipher key when encrypting, and causes the leakage of user profile easily and threatens user's information security.
Summary of the invention
The object of the present invention is to provide the encryption method of a kind of mobile multimedia broadcast system and use thereof, be intended to solve under the prior art, reveal the problem of user profile in the mobile multimedia broadcast system during secure service key easily.
The present invention is achieved in that a kind of encryption method of mobile multimedia broadcast system, and described method comprises: the mobile multimedia broadcasting service platform on terminal visit ground is to the mobile multimedia broadcasting service platform request secure service key on terminal attaching ground;
The mobile multimedia broadcasting service platform on terminal attaching ground after detecting business cipher key, uses the respective user key that business cipher key is encrypted according to the secure service key request;
The mobile multimedia broadcasting service platform on terminal attaching ground sends to encrypted service key the mobile multimedia broadcasting service platform on terminal visit ground.
Another object of the present invention is to provide a kind of mobile multimedia broadcast system, use the device of user key secure service key when user terminal is roamed, described device comprises:
Encrypt request unit, be used for visiting the mobile multimedia broadcasting service platform request secure service key of the mobile multimedia broadcasting service platform on ground to terminal attaching ground from terminal;
The business cipher key ciphering unit is used for after the mobile multimedia broadcasting service platform on terminal attaching ground is detecting business cipher key according to the secure service key request, uses the respective user key that business cipher key is encrypted;
Business cipher key returns the unit, is used for from the mobile multimedia broadcasting service platform on terminal attaching ground encrypted service key being sent to the mobile multimedia broadcasting service platform on terminal visit ground.
The invention has the beneficial effects as follows: use the present invention to realize encryption, can avoid user key passed to the mobile multimedia broadcasting service platform beyond the ownership place and the leakage of information risk that causes business cipher key.
Description of drawings
Fig. 1 is the structure chart of the mobile multimedia broadcast system that provides of prior art;
Fig. 2 is the flow chart of steps that user key secure service key is provided during terminal roaming in the mobile multimedia broadcasting service system that provides of the embodiment of the invention;
Fig. 3 is the process chart of a kind of program source that the embodiment of the invention provides secure service key when producing for the ownership place mobile multimedia broadcasting service platform;
Fig. 4 is the another kind of business cipher key encryption flow chart that the embodiment of the invention provides;
Fig. 5 is the structure drawing of device of a kind of secure service key of providing of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In embodiments of the present invention, carry out user key secure service key by economizing business platform by the Mobile Multimedia Broadcasting of user ascription area, the business platform of then encrypted service key being passed to visit ground uses.Thereby the leakage of information risk of having avoided user key passed to the mobile multimedia broadcasting service platform beyond the ownership place and having caused.
The terminal that mobile multimedia broadcast system can include CMMB network business platform, mobile communication network service platform and use for the user.Each several part function related to the present invention is as described below in the mobile multimedia broadcast system:
The CMMB network business platform comprises the whole nation, each province, districts and cities' business platform.CAS in the platform (Conditional Access System, condition receiving system) can produce business cipher key, receives synchronous business cipher key and preserve business cipher key; To relaying platform synchronized transmission business cipher key; Receive the business cipher key request of mobile communication network service platform, and return business cipher key; Economize platform encrypts to ownership province platform request business cipher key from visit ground; Economize platform from visit ground to being relayed ground platform requested service key.
Mobile communication network service platform: can send to terminal and upgrade the business cipher key indication, initiate more new technological process of business cipher key with triggering terminal; Can obtain business cipher key from the program source place mobile multimedia broadcasting service platform the CMMB network business platform; The receiving terminal business cipher key obtains request, and returns the corresponding business key information;
Business cipher key: produce by the on-site mobile multimedia broadcasting service platform of program source.
Terminal: can receive and use business cipher key to CMMB network business platform or mobile communication network service platform acquisition request business cipher key.Terminal mainly is divided into unidirectional terminal and two kinds of forms of bidirectional terminal.Unidirectional terminal is that can only to receive mobile multimedia broadcast television professional and do not possess the receiving terminal of uplink passage, mainly comprises PDA (Personal Digital Assistant, personal digital assistant), MP3, MP4 and digital camera etc.; Bidirectional terminal is except receiving the mobile multimedia broadcast television business, possesses the receiving terminal of uplink passage simultaneously, mainly comprises mobile phone, notebook computer etc.
Mobile Multimedia Broadcasting platform in visit ground is when the ownership place Mobile Multimedia Broadcasting is economized platform and initiated the initiation of secure service key request and comprise the effective business cipher key of terminal request opportunity in the present invention; When reaching the business cipher key renewal and need send to terminal.
Be meant during the effective business cipher key of terminal request that bidirectional terminal needs business cipher key and initiatively initiate the effective business cipher key of request or according to visit ground the indication of Mobile Multimedia Broadcasting platform initiate the effective business cipher key of request, or other any reason makes the effective business cipher key of bidirectional terminal request; After business cipher key upgrades and the Mobile Multimedia Broadcasting platform that is meant program source need send to terminal the time carried out upgrading to the business cipher key of program, send to relevant Mobile Multimedia Broadcasting platform and to upgrade business cipher key and indicate.Can suppose that in embodiments of the present invention terminal is unidirectional terminal, this moment, this unidirectional terminal visit ground Mobile Multimedia Broadcasting platform needed initiatively the business cipher key that upgrades to be sent to unidirectional terminal.Those skilled in the art will appreciate that visit ground Mobile Multimedia Broadcasting platform to be set when terminal is bidirectional terminal, also need initiatively the business cipher key that upgrades to be sent to terminal.
Fig. 2 uses the steps flow chart of user key secure service key when showing terminal roaming in the mobile multimedia broadcasting service system that the embodiment of the invention provides.For convenience of description, only show part related to the present invention here:
In step S201: terminal visit ground Mobile Multimedia Broadcasting platform is to terminal attaching ground Mobile Multimedia Broadcasting platform request secure service key;
The information that visit ground Mobile Multimedia Broadcasting platform is economized platform request secure service key to the ownership place Mobile Multimedia Broadcasting comprises user ID, for example subscriber phone number etc.
In step S202: after ownership place Mobile Multimedia Broadcasting platform detects business cipher key, use respective user secret key encryption business cipher key;
The user ID that ownership place Mobile Multimedia Broadcasting platform provides according to step S201 selects to use the user key in its user information corresponding that business cipher key is encrypted.
In step S203: ownership place Mobile Multimedia Broadcasting platform returns encrypted service key to visit ground Mobile Multimedia Broadcasting platform;
Visit ground Mobile Multimedia Broadcasting is economized the encrypted service key that platform obtains, can be corresponding with above-mentioned user ID.So just finished encryption to business cipher key.
The handling process of secure service key when a kind of program source that Fig. 3 shows the embodiment of the invention to be provided is the ownership place mobile multimedia broadcasting service platform.Comprise the steps:
In step S301: visit ground Mobile Multimedia Broadcasting platform request business cipher key is asked the secure service key simultaneously;
Because program source is the Mobile Multimedia Broadcasting platform on terminal attaching ground, so when visiting ground Mobile Multimedia Broadcasting platform, can ask simultaneously this business cipher key is encrypted to terminal attaching ground Mobile Multimedia Broadcasting platform request business cipher key.
Request message has comprised user ID fields such as (for example, subscriber phone numbers).
In step S302: the ownership place mobile multimedia broadcasting service platform produces and the secure service key;
The ownership place Mobile Multimedia Broadcasting is economized platform and is produced business cipher key, the user ID that provides according to step 301, select to use the user key in its user information corresponding, use cryptographic algorithm, directly the program corresponding service key that himself produces is encrypted.
In step S303: the secure service key also returns.
The ownership place Mobile Multimedia Broadcasting is economized platform and is provided response to visit ground Mobile Multimedia Broadcasting platform, comprises encrypted service key.
Like this, mobile multimedia broadcasting service platform requested service key is asked the secure service key simultaneously on visit ground, and the ownership place mobile multimedia broadcasting service platform is directly encrypted after producing business cipher key, can accelerate to realize the encryption of business cipher key like this.
Fig. 4 shows the another kind of business cipher key encryption flow process that the embodiment of the invention provides, and comprises the steps:
In step S401: visit ground Mobile Multimedia Broadcasting platform is to ownership place Mobile Multimedia Broadcasting platform request secure service key;
In the present embodiment, the CAS by visit ground Mobile Multimedia Broadcasting platform sends this secure service key request to ownership place broadcasting and TV platform; Include user totem information in the message of request.
In step S402: if when the CAS of ownership place Mobile Multimedia Broadcasting platform does not detect business cipher key, then the CAS to visit ground Mobile Multimedia Broadcasting platform asks this secure service key request corresponding service key;
In step S403: the CAS of visit ground Mobile Multimedia Broadcasting platform returns the CAS that this business cipher key is given ownership place Mobile Multimedia Broadcasting platform;
In step S404: user ascription area Mobile Multimedia Broadcasting platform CAS uses corresponding user key that business cipher key is encrypted;
In step S405: ownership place Mobile Multimedia Broadcasting platform CAS returns to visit ground Mobile Multimedia Broadcasting platform CAS with encrypted service key.
Fig. 5 shows the device of a kind of secure service key that the embodiment of the invention provides.This device uses the device of user key secure service key when roaming for user terminal, can place mobile multimedia broadcast system.For convenience of description, only show part related to the present invention here.Described system comprises:
Encrypt request unit 501, be used for visiting the mobile multimedia broadcasting service platform request secure service key of the mobile multimedia broadcasting service platform on ground to terminal attaching ground from terminal; Specifically as mentioned above.
Business cipher key ciphering unit 502 is used for after the mobile multimedia broadcasting service platform on terminal attaching ground is detecting business cipher key according to the secure service key request, uses the respective user key that business cipher key is encrypted; Specifically as mentioned above.
Business cipher key returns unit 503, is used for from the mobile multimedia broadcasting service platform on terminal attaching ground encrypted service key being sent to the mobile multimedia broadcasting service platform on terminal visit ground.Specifically as mentioned above.
By above-mentioned three unit, the mobile multimedia broadcasting service platform on visit ground can realize safely that the business cipher key that it will be sent to terminal encrypts.
Said system comprises that also the business cipher key request of encrypting initiates the unit, is used for when bidirectional terminal request effective traffic key or business cipher key upgrades and trigger need send to unidirectional terminal the time and encrypt request unit 501 and initiate request secure service keys.Specifically as mentioned above.
Said system can also comprise the business cipher key request unit, visits ground Mobile Multimedia Broadcasting platform request business cipher key to terminal when being used for detecting after terminal attaching ground Mobile Multimedia Broadcasting platform is received the secure service key request less than business cipher key.Specifically as mentioned above.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the encryption method of using in the mobile multimedia broadcast system is characterized in that described method comprises when user terminal is roamed:
The mobile multimedia broadcasting service platform on terminal visit ground is to the mobile multimedia broadcasting service platform request secure service key on terminal attaching ground;
The mobile multimedia broadcasting service platform on terminal attaching ground after detecting business cipher key, uses the respective user key that business cipher key is encrypted according to the secure service key request;
The mobile multimedia broadcasting service platform on terminal attaching ground sends to encrypted service key the mobile multimedia broadcasting service platform on terminal visit ground.
2. encryption method as claimed in claim 1 is characterized in that, includes user ID in the solicited message of described request secure service key.
3. encryption method as claimed in claim 2 is characterized in that, comprises business cipher key to be encrypted in the solicited message of described secure service key request simultaneously.
4. encryption method as claimed in claim 1, it is characterized in that, when described method was mobile multimedia broadcasting service platform request to described terminal attaching ground when business cipher key, mobile multimedia broadcasting service platform request secure service key step and the requested service key of mobile multimedia broadcasting service platform to terminal attaching ground on described terminal visit ground carried out simultaneously; With the mobile multimedia broadcasting service platform on terminal attaching ground according to the secure service key request after detecting business cipher key, use the respective user key that business cipher key is carried out encrypting step, for: the mobile multimedia broadcasting service platform on described terminal attaching ground after detecting the business cipher key that himself produces, directly uses the respective user key that business cipher key is encrypted according to the secure service key request.
5. encryption method as claimed in claim 1 or 2, it is characterized in that, the mobile multimedia broadcasting service platform on described terminal attaching ground according to the secure service key request after detecting business cipher key, use user key that business cipher key is carried out encrypting step, after the mobile multimedia broadcasting service platform on terminal attaching ground is received the request of encryption, then carry out following step when not detecting business cipher key:
The described encryption request of mobile multimedia broadcasting service platform request corresponding service key to terminal visit ground;
The mobile multimedia broadcasting service platform on terminal visit ground is returned the mobile multimedia broadcasting service platform that described business cipher key is given terminal attaching ground;
The mobile multimedia broadcasting service platform on terminal attaching ground uses corresponding user key that described business cipher key is encrypted.
6. as the described encryption method of the arbitrary claim of claim 1 to 4, it is characterized in that, the mobile multimedia broadcasting service platform on described terminal visit ground comprises in the mobile multimedia broadcasting service platform request secure service key step on terminal attaching ground the opportunity of initiating request:
During terminal request effective traffic key; And
Business cipher key upgrades and need send to terminal the time.
7. encryption method as claimed in claim 5, it is characterized in that, it is characterized in that the mobile multimedia broadcasting service platform on described terminal visit ground comprises the opportunity of initiating request in the mobile multimedia broadcasting service platform request secure service key step on terminal attaching ground:
During terminal request effective traffic key; And
Business cipher key upgrades and need send to terminal the time.
8. a mobile multimedia broadcast system is characterized in that, described system uses the device of user key secure service key when comprising user terminal roaming, and described device comprises:
Encrypt request unit, be used for visiting the mobile multimedia broadcasting service platform request secure service key of the mobile multimedia broadcasting service platform on ground to terminal attaching ground from terminal;
The business cipher key ciphering unit is used for after the mobile multimedia broadcasting service platform on terminal attaching ground is detecting business cipher key according to the secure service key request, uses the respective user key that business cipher key is encrypted;
Business cipher key returns the unit, is used for from the mobile multimedia broadcasting service platform on terminal attaching ground encrypted service key being sent to the mobile multimedia broadcasting service platform on terminal visit ground.
9. system as claimed in claim 8, it is characterized in that, described system comprises that also the business cipher key request of encrypting initiates the unit, is used for when bidirectional terminal request effective traffic key or business cipher key upgrades and trigger need send to unidirectional terminal the time and encrypt request unit and initiate request secure service key.
10. system as claimed in claim 8 or 9, it is characterized in that, described system also comprises the business cipher key request unit, visits ground Mobile Multimedia Broadcasting platform request business cipher key to terminal when being used for detecting after terminal attaching ground Mobile Multimedia Broadcasting platform is received the secure service key request less than business cipher key.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910107364.9A CN101888628B (en) | 2009-05-15 | 2009-05-15 | Mobile multimedia broadcasting system and encryption method employed by same |
| PCT/CN2010/072795 WO2010130228A1 (en) | 2009-05-15 | 2010-05-14 | Mobile multimedia broadcasting system and applied encryption method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910107364.9A CN101888628B (en) | 2009-05-15 | 2009-05-15 | Mobile multimedia broadcasting system and encryption method employed by same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101888628A true CN101888628A (en) | 2010-11-17 |
| CN101888628B CN101888628B (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910107364.9A Active CN101888628B (en) | 2009-05-15 | 2009-05-15 | Mobile multimedia broadcasting system and encryption method employed by same |
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| Country | Link |
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| CN (1) | CN101888628B (en) |
| WO (1) | WO2010130228A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515768A (en) * | 2016-01-08 | 2016-04-20 | 腾讯科技（深圳）有限公司 | Method, device and system for updating secret key |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1829389B (en) * | 2006-04-14 | 2010-11-10 | ***通信集团公司 | Method and system for holding terminal nomadism in mobile broadcast television service |
| CN101383673B (en) * | 2008-10-20 | 2011-11-30 | 中兴通讯股份有限公司 | Controlling method and system for mobile multimedia broadcast service |
| CN101394243B (en) * | 2008-10-29 | 2011-04-06 | 中兴通讯股份有限公司 | System and method for realizing mobile multimedia broadcast service |
| CN101409595B (en) * | 2008-11-26 | 2011-10-26 | 中兴通讯股份有限公司 | System and method for implementing mobile multimedia broadcast service |
-
2009
- 2009-05-15 CN CN200910107364.9A patent/CN101888628B/en active Active
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2010
- 2010-05-14 WO PCT/CN2010/072795 patent/WO2010130228A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515768A (en) * | 2016-01-08 | 2016-04-20 | 腾讯科技（深圳）有限公司 | Method, device and system for updating secret key |
| CN105515768B (en) * | 2016-01-08 | 2017-07-21 | 腾讯科技（深圳）有限公司 | A kind of methods, devices and systems of more new key |
| US11088836B2 (en) | 2016-01-08 | 2021-08-10 | Tencent Technology (Shenzhen) Company Limited | Key updating method, apparatus, and system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010130228A1 (en) | 2010-11-18 |
| CN101888628B (en) | 2014-11-05 |
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