CN101499866A - Service cipher key transmitting method in multimedia broadcast service - Google Patents
Service cipher key transmitting method in multimedia broadcast service Download PDFInfo
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- CN101499866A CN101499866A CNA2008100070615A CN200810007061A CN101499866A CN 101499866 A CN101499866 A CN 101499866A CN A2008100070615 A CNA2008100070615 A CN A2008100070615A CN 200810007061 A CN200810007061 A CN 200810007061A CN 101499866 A CN101499866 A CN 101499866A
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Abstract
The invention discloses a business key transmitting method in multimedia broadcast business and comprises the following steps: a cellphone television platform publishes cellphone television business information and generates business guideline information that contains business key stream information; a cellphone terminal finishes business subscription with the cellphone television platform by a transmission bearing network and obtains the business guideline information; the cellphone television platform respectively sends media stream and the business key stream information to the cellphone terminal; the cellphone terminal listens to a response port according to the business key stream information that is provided by the business guideline information and obtains the business key stream information; the cellphone terminal obtains a business key by decryption, determines a corresponding relationship between the business key and a program key, uses the business key to decrypt the program key, uses the program key to decrypt the media stream information, and finally decodes and plays the media stream information. The business key transmitting method of the invention can flexibly realize the business key transmission and the preliminary binding relationship between the business key and the program key.
Description
Technical field
The present invention relates to the method that business cipher key transmits in a kind of multimedia service, in particular, relate to the transfer approach of business cipher key between mobile phone terminal and the television platform.
Background technology
Mobile phone TV services are meant by mobile phone terminal and receive the video coding signal that wireless mode transmits, and the business of decoding and playing at mobile phone terminal.The user can not be subjected to the restriction of conditions such as time, place to use mobile phone TV services, has strengthened people and has obtained the convenience of information or amusement.
Mobile phone TV services are rich and varied, be applicable to that different audients uses, for guaranteeing the legal use multi-media broadcasting service of user, grid can adopt key that the media content of transmission is encrypted, relatively more commonly used is three layers of safe key system, at first, sets up cipher key shared information between mobile phone terminal and the television platform, this shared key can adopt several different methods to set up, as the GBA process of 3GPP (third generation affiliate) regulation; Secondly, the business cipher key that television platform will be shared secret key encryption sends mobile phone terminal to; Once more, television platform is sent to mobile phone terminal with the program key of business cipher key encryption.
After finishing three layers of keys foundation, mobile phone terminal can be decrypted decoding and play to the multimedia broadcasting information that the program key that receives from television platform is encrypted.Under three layers of key framework, but multiple mode transport service key is arranged, for example: after the user finishes and orders, send business cipher key immediately to the user, perhaps send to mobile phone terminal according to designated port, these modes are the designated ends slogan arbitrarily, can not realize the preliminary binding relationship between program key and the business cipher key flexibly, relatively poor in flexibility, can not when upgrading, needs send business cipher key at any time to the mobile phone terminal.
Summary of the invention
The technical problem to be solved in the present invention is: service cipher key transmitting method in a kind of multi-media broadcasting service is provided, can realizes the transmission of business cipher key and the preliminary binding relationship between business cipher key and the program key flexibly.
In order to address the above problem, the invention provides service cipher key transmitting method in a kind of multi-media broadcasting service, may further comprise the steps:
(1) television platform issue mobile phone TV services information, and generate the business guide information that comprises the business cipher key stream information;
(2) mobile phone terminal is finished service order with described television platform by the transmission bearer network, and obtains described business guide information;
(3) described television platform sends Media Stream and business cipher key stream information respectively to described mobile phone terminal; Described mobile phone terminal obtains the business cipher key stream information according to the business cipher key stream information listens for responsive port that described business guide information provides;
(4) described mobile phone terminal deciphering obtains business cipher key, and the corresponding relation between definite business cipher key and the program key, deciphers program key with business cipher key, plays with program key decrypt media stream information and decoding.
Further, in the step (1), the business cipher key stream information comprises the management type information under streamed port information of business cipher key and the business cipher key stream.
Further, in the step (2), mobile phone TV terminal receives the data message that the transmission bearer network transmits by broadcasting and interactive mode, and obtains business guide information by the transmission bearer network from the television platform order business.
Further, step (3) further comprises:
The port numbers that television platform is set according to business guide adopts broadcast mode to send Media Stream and business cipher key stream information respectively to mobile phone terminal; Mobile phone terminal according among the SDP of business guide about Streaming Media and business cipher key stream description information, intercept at the port of setting, obtain medium stream information and business cipher key stream information, and obtain the program key information of encrypting from designated port.
Further, in the step (4), the corresponding relation between business cipher key and the program key is to determine according to the term of validity scope identification information of business cipher key.
Further, in the step (4), business cipher key obtains by the secret key decryption business cipher key stream information of described mobile phone terminal according to ground floor in three layers of key structure.
Further, mobile phone terminal receives broadcast medium stream information and the business cipher key stream information that bearer network sends at least one port snooping, and obtains business guide information alternately by bearer network and television platform.
Further, television platform is used to generate business cipher key and business guide information, and increases the business cipher key associated description information in business guide.
Beneficial effect of the present invention:
Adopt method proposed by the invention, in cipher key transmitting process, has flexibility, can when upgrading, needs send business cipher key at any time to the mobile phone terminal, can be flexibly designated ends slogan arbitrarily, can realize the preliminary binding relationship between program key and the business cipher key flexibly, finish the transmission of business cipher key in the multi-media broadcasting service.
Description of drawings
Fig. 1 is the handset television service system schematic diagram of the method for the invention;
Fig. 2 is that the business cipher key of the method for the invention transmits flow chart.
Embodiment
The present invention relates in the multi-media broadcasting service, the handset television service system that mobile phone terminal and television platform constitute, wherein:
Mobile phone terminal: can receive broadcast medium stream information and the business cipher key stream information that bearer network sends at least one port snooping, and can obtain business guide information alternately by bearer network and television platform;
Television platform: can generate business cipher key, business guide information, and can in business guide, increase the business cipher key associated description information;
Transmission bearer network: be used for mutual between mobile phone terminal and the television platform.
Based on above-mentioned operation system, adopt following steps to realize that business cipher key transmits:
(1) television platform issue mobile phone TV services information, and generation business guide information, in the SDP that in business guide, comprises (Session Description Protocol) information, include business cipher key and spread sending end message breath and the affiliated management type information of business cipher key stream;
(2) mobile phone terminal is finished service order with described television platform by the transmission bearer network, and obtains described business guide information;
Mobile phone TV terminal receives the data message that the transmission bearer network transmits by broadcasting and interactive mode, and obtains business guide information by the transmission bearer network from the television platform order business.
(3) television platform adopts broadcast mode to send Media Stream, business cipher key stream information respectively to mobile phone terminal; The business cipher key stream information listens for responsive port that mobile phone terminal provides according to business guide information obtains the business cipher key stream information;
(4) described mobile phone terminal deciphering obtains business cipher key, and the corresponding relation between definite business cipher key and the program key, deciphers program key with business cipher key, plays with program key decrypt media stream information and decoding.
Corresponding relation between business cipher key and the program key is to determine according to the term of validity scope identification information of business cipher key.
Below in conjunction with preferred embodiment the method for the invention is elaborated.
Shown in Figure 1: in the operation system of service cipher key transmitting method, this system comprises in the multi-media broadcasting service: mobile phone terminal 101, television platform 103 and transmission bearer network 102.
As shown in Figure 2, the present invention adopts following steps to realize the transmission of business cipher key:
Step S201: television platform 103 issue mobile phone TV services information, and generate business guide information, comprise the following information of business cipher key stream description:
The streamed port of business cipher key:
m＝application49230udp?vnd.oma.bcast.ltkm
Management type information under the business cipher key:
a＝fmtp:vnd.oma.bcast.ltkmkmstype＝oma-bcast-drm-pki；
serviceprovider＝SOMEID
Step S202: mobile phone terminal 101 is ordered mobile phone TV services from television platform 103, and obtains business guide information;
Step S203: the port numbers that television platform 103 is set according to business guide, send medium stream information, business cipher key stream information to mobile phone terminal 101, program key information can adopt the designated port mode to send;
Step S204: mobile phone terminal 101 according among the SDP of business guide about Media Stream and business cipher key stream description information, intercept setting port, obtain medium stream information and business cipher key stream information, and obtain the program key information of encrypting from designated port;
Step S205: the whole terminal 101 of hand obtains business cipher key according to the secret key decryption business cipher key stream information of ground floor in three layers of key structure;
Step S206: mobile phone terminal 101 is determined corresponding relation between business cipher key and the program key according to the term of validity scope identification information of business cipher key, and utilize business cipher key to decipher program key, with program key decrypt media stream information, carry out media play at mobile phone terminal.
The above is embodiments of the invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (8)
1, service cipher key transmitting method in a kind of multi-media broadcasting service is characterized in that, may further comprise the steps:
(1) television platform issue mobile phone TV services information, and generate the business guide information that comprises the business cipher key stream information;
(2) mobile phone terminal is finished service order with described television platform by the transmission bearer network, and obtains described business guide information;
(3) described television platform sends Media Stream and business cipher key stream information respectively to described mobile phone terminal; Described mobile phone terminal obtains the business cipher key stream information according to the business cipher key stream information listens for responsive port that described business guide information provides;
(4) described mobile phone terminal deciphering obtains business cipher key, and the corresponding relation between definite business cipher key and the program key, deciphers program key with business cipher key, plays with program key decrypt media stream information and decoding.
2, the method for claim 1 is characterized in that, in the step (1), described business cipher key stream information comprises the management type information under streamed port information of business cipher key and the business cipher key stream.
3, the method for claim 1, it is characterized in that, in the step (2), described mobile phone TV terminal receives the data message that described transmission bearer network transmits by broadcasting and interactive mode, and obtains business guide information by described transmission bearer network from described television platform order business.
4, the method for claim 1 is characterized in that, step (3) further comprises:
The port numbers that television platform is set according to business guide adopts broadcast mode to send Media Stream and business cipher key stream information respectively to mobile phone terminal; Mobile phone terminal according among the SDP of business guide about Streaming Media and business cipher key stream description information, intercept at the port of setting, obtain medium stream information and business cipher key stream information, and obtain the program key information of encrypting from designated port.
5, the method for claim 1 is characterized in that, in the step (4), the corresponding relation between described business cipher key and the program key is to determine according to the term of validity scope identification information of described business cipher key.
6, the method for claim 1 is characterized in that, in the step (4), described business cipher key obtains by the secret key decryption business cipher key stream information of described mobile phone terminal according to ground floor in three layers of key structure.
7, the method for claim 1, it is characterized in that, described mobile phone terminal receives broadcast medium stream information and the business cipher key stream information that bearer network sends at least one port snooping, and obtains business guide information alternately by bearer network and television platform.
8, the method for claim 1 is characterized in that, described television platform is used to generate business cipher key and business guide information, and increases the business cipher key associated description information in business guide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100070615A CN101499866B (en) | 2008-02-01 | 2008-02-01 | Service cipher key transmitting method in multimedia broadcast service |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100070615A CN101499866B (en) | 2008-02-01 | 2008-02-01 | Service cipher key transmitting method in multimedia broadcast service |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101499866A true CN101499866A (en) | 2009-08-05 |
| CN101499866B CN101499866B (en) | 2011-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100070615A Expired - Fee Related CN101499866B (en) | 2008-02-01 | 2008-02-01 | Service cipher key transmitting method in multimedia broadcast service |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101998384A (en) * | 2009-08-18 | 2011-03-30 | 中国移动通信集团公司 | Method for encrypting transmission medium stream, encryption server and mobile terminal |
| CN102158757A (en) * | 2010-02-11 | 2011-08-17 | 中兴通讯股份有限公司 | Terminal and method for playing television service thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100442839C (en) * | 2003-05-09 | 2008-12-10 | 华为技术有限公司 | Information transmitting method and apparatus for interactive digital broadcast television system |
| CN101047956B (en) * | 2006-03-30 | 2010-10-27 | 华为技术有限公司 | Multimedia broadcast service system and method |
| CN101060613A (en) * | 2006-04-21 | 2007-10-24 | 华为技术有限公司 | Digital TV broadcasting service receiving and deciphering method, master terminal and its slave terminal |
| CN101009553A (en) * | 2006-12-30 | 2007-08-01 | 中兴通讯股份有限公司 | Secret key safety method and system for realizing multi-network integration mobile multi-media broadcasting system |
-
2008
- 2008-02-01 CN CN2008100070615A patent/CN101499866B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101998384A (en) * | 2009-08-18 | 2011-03-30 | 中国移动通信集团公司 | Method for encrypting transmission medium stream, encryption server and mobile terminal |
| CN101998384B (en) * | 2009-08-18 | 2014-03-26 | 中国移动通信集团公司 | Method for encrypting transmission medium stream, encryption server and mobile terminal |
| CN102158757A (en) * | 2010-02-11 | 2011-08-17 | 中兴通讯股份有限公司 | Terminal and method for playing television service thereof |
| WO2011097877A1 (en) * | 2010-02-11 | 2011-08-18 | 中兴通讯股份有限公司 | Terminal and television service playing method thereof |
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| Publication number | Publication date |
|---|---|
| CN101499866B (en) | 2011-12-07 |
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