Encryption and decryption system based on medium security protection of IPTV platform

An encryption and decryption, platform technology, applied in the field of encryption and decryption systems

Inactive Publication Date: 2009-09-02
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a fast and safe media security encryption and decryption system for the deficiencies of the existing IPTV playback system platform

Method used

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  • Encryption and decryption system based on medium security protection of IPTV platform
  • Encryption and decryption system based on medium security protection of IPTV platform
  • Encryption and decryption system based on medium security protection of IPTV platform

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Embodiment Construction

[0031] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0032] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0033] figure 1 It is a media file storage structure diagram, where the media information length: indicates the length of the entire data structure of the media information, for example, 4 bytes; media data: the source media file information block, for the convenience of the client to parse the information, the size of the general information block Use a fixed value, for example, the size of each block is 512K. Information summary: the MD5 v...

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Abstract

The invention discloses an encryption and decryption system based on the medium security protection of an IPTV platform. On a platform end in the method, each sub-block of a media file is firstly carried out with MD5 operation, then a section of information is combined by the MD5 values obtained from the sub-blocks, the information is carried out with MD5 operation again, an obtained result is placed in a playlist, and finally, the playlist is encrypted. On a terminal, firstly, the playlist is decrypted, MD5 values of information abstracts of the media file, which are obtained from the playlist, are compared with the MD5 of information abstracts combined by all the sub-blocks of an operation file; if the two MD5 values are not identical, the play is prohibited; if the two MD5 values are identical, the MD5 of each sub-block is compared, if identical, the information is placed in a buffer area to by played; and if else, the play is stopped. The method has high speed and high safety factor.

Description

technical field [0001] The invention relates to IPTV system media technology, in particular to an encryption and decryption system based on IPTV platform media security. Background technique [0002] At present, domestic IPTV media resources are stored in the terminal in the form of source files (unencrypted). As long as it is a file supported by the terminal, it can be played. The terminal controls the content to be played through the playlist, and the specified file name is used to index the media file and play it. It is determined that the content played by the terminal is only related to the playlist, and there is no restriction on the media file itself, so as long as it is a normal file with a matching file name, it can be played. If the file of the terminal is replaced by a file with the same name, then the existing IPTV system is uncontrollable, and the situation of playing illegal content under malicious damage cannot be ruled out. At the same time, the storage of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24H04N7/167H04L9/08H04L9/06H04L9/32H04N21/266H04N21/854
Inventor 王海鹏余健
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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