A method for content protection of the handset TV service

A mobile TV service and mobile TV technology, applied in the field of communication, to achieve the effect of less system changes

Active Publication Date: 2009-09-23
CHINA TELECOM CORP LTD
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  • Description
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AI Technical Summary

Problems solved by technology

[0049] In order to solve the above-mentioned technical problems, a method for protecting the content of mobile TV services is provided, the purpose of which is to solve the problem that CDMA users watch digital broadcasting network TV programs on CDMA terminals based on the BCMCS security architecture

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  • A method for content protection of the handset TV service
  • A method for content protection of the handset TV service
  • A method for content protection of the handset TV service

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Embodiment Construction

[0078] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0079] The method process of the present invention is as Figure 5 As shown, the mobile TV / mobile multimedia broadcasting content provider uses the CA system to generate the control word (CW), and the CW is used as the content key to encrypt the content, and then sends the CW to the mobile operator, and the operator follows the BCMCS security framework. BAK and SK_RAND generate SK to encrypt CW, and the encrypted CW is returned to the mobile TV / mobile multimedia broadcasting content provider together with the index BAK_ID and SK_RAND of BAK. The mobile TV / mobile multimedia broadcasting content provider broadcasts the encrypted content, BAK_ID and SK_RAND to the terminal together. On the terminal side, according to the key distribution process of BCMCS, UIM generates SK from BAK and SK_RAND, and sends SK back to ME, ME uses SK to decrypt CW, and then CW decry...

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Abstract

The present invention relates to a method for protecting mobile TV service content, comprising the following steps: Step 1, mobile TV / mobile multimedia broadcast content provider using a control word generated by a conditional access system to encrypt mobile broadcast content; Step 2, sending the control word to The mobile phone TV service platform of the mobile communication operator; Step 3, the control entity in the mobile TV service platform encrypts the control word; Step 4, decrypts the encrypted control word and the terminal after the encrypted The parameters needed by the control word are sent to the mobile phone TV / mobile multimedia broadcasting content provider; step 5, the mobile phone TV / mobile multimedia broadcasting content provider encrypts the mobile phone TV / mobile multimedia broadcasting content provider through the content provider network The broadcast content, the encrypted control word and the parameters are sent to the terminal; step 6, the terminal decrypts the mobile broadcast content encrypted by the control word. By adopting the method of the present invention, the least changes to the system are made, and it is also beneficial for mobile communication operators to develop broadcast and multicast services after establishing a BCMCS network in the future.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for protecting mobile TV service content. Background technique [0002] With the development of communication technology, mobile communication operators can provide users with multimedia services based on authorization (subscription). Subscribed users can use the service, while non-subscribed users cannot use the service. Broadcast Multicast Service (BCMCS) is a service that provides broadcast / multicast to authorized (subscription) users. [0003] The network structure of BCMCS is as follows figure 1 As shown, a content source (CS) provides content to BCMCS users through a cellular system. The content can be IP multimedia messages such as audiovisual data, or broadcast multimedia messages. CS can be an integral part of the service network, or an independent entity. If BCMCS access is based on subscription, then only authorized users can browse / process the content after the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/167H04N7/16H04L9/00
Inventor 张智江严斌峰裴小燕朱爱华
Owner CHINA TELECOM CORP LTD
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