Method for protecting copyright of video content using user recognizing module

A technology for user identification module and video content, which is applied in the direction of program/content distribution protection, analog security/charging system, pulse modulated TV signal transmission, etc.

Active Publication Date: 2009-01-21
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0010] Another object of the present invention is to solve the problem of safe storage of key and authority information on the universal mobile platform by introducing the user identification module into the digital rights management architecture

Method used

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  • Method for protecting copyright of video content using user recognizing module

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Embodiment Construction

[0026] The copyright protection method of the video content using the user identification module proposed by the present invention, its principle block diagram is as follows figure 1 shown, including the following steps:

[0027] (1) The client player uses the content identifier to send a request to the client digital rights agent module (hereinafter referred to as DRMAgent) to view the program playback authority, wherein the content identifier is an integer with a length of 64 bits;

[0028] (2) After the digital rights agency module of the client terminal receives the above-mentioned request, if in the client storage, in this embodiment, the storage of the mobile phone of the client, the scope of authority (hereinafter referred to as RO) corresponding to the above-mentioned content identifier is not found, then Start the scope of authority acquisition protocol in the digital copyright agent module of the client, and send a request to the authority issuing server to purchase ...

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Abstract

The invention relates to a video content copyright protection method which uses the subscriber identity module, belonging to the technical field of digital copyright protection. A video player advances the requests and a DRM Agent receives the requests to access a corresponding RO and requests an SIM card for decoding the RO; the SIM card returns a key to the DRM Agent for decoding the RO; the DRM Agent receives the key and adopts the AES algorithm to decode the RO and extract a video content key and permission information; the content key is used for decoding the video content which is protected; the DRM Agent and SIM card separately upgrade the permission information after playing. The method of the invention has the advantages that by introducing the subscriber identity module, the storage safety of the permission limit in the digital copyright management system; even after the subscriber replaces the mobile terminal, the digital content with the purchased copyright could be also protected; therefore, the invention could be widely used.

Description

technical field [0001] The invention relates to a copyright protection method for video content using a user identification module, and belongs to the technical field of digital copyright protection. Background technique [0002] Mobile TV service is a multimedia service provided by mobile operators that uses mobile terminal equipment (such as ordinary mobile phones, smart phones, personal digital assistants, etc.) as terminals for receiving and playing TV programs and transmits them through mobile communication networks and wireless channels. Its appearance enables people to watch TV programs through mobile terminal devices such as mobile phones anytime, anywhere. With the improvement of mobile terminal performance and the continuous reduction of hardware costs, the mobile TV business is developing rapidly, and is regarded by the industry as another killer application of mobile platforms. [0003] However, the existing mobile TV business does not effectively protect the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/16H04N7/24G06F21/00G06F21/10
Inventor 王建民王朝坤刘璋何申何显波
Owner TSINGHUA UNIV
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