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A method for content protection of the handset TV service

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

Active Publication Date: 2007-07-11
CHINA TELECOM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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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 flow of the present invention is shown in Figure 5, the mobile TV / mobile multimedia broadcasting content provider uses the CA system to generate a control word (CW), and the CW is used as a content key to encrypt the content, and then sends the CW to the mobile operator. According to the BCMCS security framework, the operator generates SK from BAK and SK_RAND to encrypt CW, and the encrypted CW is returned to the mobile TV / mobile multimedia broadcasting content provider together with BAK index BAK_ID and SK_RAND. 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 decrypts the cont...

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Abstract

This invention relates to one cell phone television business content protection method, which comprises the following steps: a, the multi-media broadcast content provider codes the content by control words by system; b, sending the words to cell phone platform; c, the platform codes the words; d, sending the control words and terminal decodes to the provider; e, the said provider sends the content to the said terminal; f, decoding the content coded by the control words.

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 shown in Figure 1, the 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 content i...

Claims

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Application Information

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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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