Digital finger print generating and tracking method

A digital fingerprint and fingerprint code technology, applied in the field of digital fingerprint generation, can solve problems such as too long code words, algorithm misjudgment, and code errors, and achieve the effect of shortening the length and resisting sudden errors
CN101276407BInactive Publication Date: 2010-06-02WUHAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN UNIV
Publication Date
2010-06-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a digital fingerprint generating and tracking algorithm. The digital fingerprint generating method comprises constructing fingerprint codeword via three-level cascaded encodingmeans, namely using anti-collusion code as inner code to construct characteristic fingerprint code at first, then using error-correcting code as outer code to construct unit fingerprint code, finallyserially connecting a plurality of unit fingerprint codes to construct joint fingerprint code; the digital fingerprint tracking method comprises using soft-judge tracking means to judge whether the user participates the collusion, namely carrying out quantization calculation on the user collusion-participating degree, and judging the collusion user according to the user collusion-participating degree. The invention is suitable for being embedded in digital copyright protection of digital works with small capacity, also capable of being applied in protection of pay-data under circumstances such as digital TV, digital broadcast, VOD, DVB, etc.
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Description

technical field

[0001] The invention belongs to the technical field of digital security, and in particular relates to a digital fingerprint generation method and a corresponding tracking method for copyright protection of digital works and traitor tracking. Background technique

[0002] In recent years, the rapid development of information technology and the wide application of e-commerce based on it have expanded the scope of dissemination of various texts, pictures, videos and other works through the Internet unprecedentedly, bringing new opportunities for creators and publishers. But at the same time, it is also easy for people to illegally copy and distribute products that exist in digital form. How to carry out copyright protection for digital products has become one of the core issues of copyright protection in the information age.

[0003] The core idea of ​​digital fingerprint technology is to mark each copy of a protected work with a unique fingerprint, so that eac...

Claims

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