Encrypting/decrypting method adapted for movie and television program content data

A technology of program content and encryption algorithm, applied to the usage of multiple keys/algorithms, TV, electrical components, etc., can solve the problem of increasing the manufacturing cost of digital movie playback system, not meeting the encryption/decryption requirements well, and difficult to realize encryption /decryption and other issues to achieve the effect of simple and reliable decryption method, prevention of illegal and bad operations, and enhancement of copyright security.

Inactive Publication Date: 2007-12-05
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the protection method of the digital movie program content can effectively protect the digital movie program content properly, it needs to adopt a special encryption module to implement the encryption of the program content data
Obviously, because encryption and decryption must be mutually inverse operations, therefore, in the decryption process, a dedicated decryption module must be added to decrypt the content data, which will undoubtedly increase the manufacturing cost of the digital movie playback system; at the same time, the encryption method It is also difficult to meet the current "one-to-one" encryption / decryption requirements for digital movie playback systems, so it cannot well meet the encryption / decryption requirements of some portable high-definition digital cinema playback equipment

Method used

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  • Encrypting/decrypting method adapted for movie and television program content data
  • Encrypting/decrypting method adapted for movie and television program content data
  • Encrypting/decrypting method adapted for movie and television program content data

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Embodiment Construction

[0023] Preferred embodiments of the method of the present invention will be further discussed in detail below with reference to the accompanying drawings. It should be understood that the detailed discussion of the following embodiments is only used to illustrate the purpose, performance and advantages of the present invention, so as to deepen the further understanding of the present invention, and does not limit the present invention to the scope of the embodiments discussed below.

[0024] Generally speaking, encryption and decryption are often inverse operations. Therefore, in order to simplify the description for a better understanding and implementation of the present invention, except for special instructions, this description often uses only one of encryption or decryption as an example. To illustrate and explain, most of them take the encryption of video program content data and the decryption implemented in the portable digital playback system as an example for illustr...

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Abstract

It is a kind of encrypting and decrypting method that is suitable for screen and video program data in electronic technology field. It includes program encrypting / decrypting and franchise encrypting / decrypting. Among which, the program encrypting / decrypting is for the program code stream content and data that stored in hard disk, so to protect the content data of screen and video program; the franchise encrypting / decrypting is for the permission of broadcast system and the broadcast program. The decrypting steps are: software decrypting that based on the software program and hardware decrypting that based on the hardware circuit. The invention takes full consideration of the security of system resource and program content data of digital broadcast system.

Description

technical field [0001] The invention relates to an encryption / decryption method, in particular to an encryption / decryption method suitable for content data of film and television programs, and is used in the field of electronic technology. Background technique [0002] As we all know, the copyright protection of digital film and television programs and the security of content data have become one of the important issues that are highly concerned by all walks of life at home and abroad. There are various encryption / decryption methods for the content data of film and television programs. For example, the method of feedback encryption can be used in the encryption process of program content, that is, the previous plaintext can be used as the encrypted data of the next data to implement encryption, so that the encrypted content data has no rules to follow, thereby improving the encryption efficiency. Depth increases the difficulty of deciphering. However, this encryption metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/167H04L9/14
Inventor 龙沪强方向忠
Owner SHANGHAI JIAOTONG UNIV
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