Digital fingerprint system and method for piracy tracking and digital evidence obtaining

Abstract

A digital fingerprint system used for piracy tracing and digital evidence-collecting comprises: a digital fingerprint generating module, a digital fingerprint storehouse, a digital fingerprint embedding module, a digital fingerprint blind-detection module, a digital fingerprint non-blind detection module and a digital evidence generating module; digital fingerprint method is that: (1) separately normally distributed Gauss signals are adopted as fingerprint signals to construct a digital fingerprint storehouse; (2) a spread spectrum embedding way is adopted to embed the fingerprints into an original copy, which generates a legal copy; (3) the legal copies are distributed and in the distribution process, the legal copies can experience a single copy illegal distribution or encounter a coalition attack, therefore a legal copy is formed; (4) the illegal copies are blindly detected to obtain a suspect copy in a lager scale; (5) the suspect copy obtained after being blindly detected is non-blindly detected; (6) the illegal copy and the original fingerprints obtained in procedure 3 and the coalition information obtained in procedure 5 are submitted as evidence to the court for trial. The digital fingerprint system has the advantages of higher detection efficiency and detection precision, thus can be widely applied in the tracing of multimedia content and piracy evidence-collecting.

Description

technical field [0001] The invention relates to a digital fingerprint design and a digital fingerprint system design method, in particular to a digital fingerprint non-blind detection design method for piracy tracking and digital forensics, belonging to the field of multimedia information security. Background technique [0002] Due to the easy and lossless copying and distribution of digital media, people can use digital technology and the Internet to copy and distribute digital media products and content protected by intellectual property rights in batches for free and without any quality loss. Unauthorized access, duplication and distribution of digital products with intellectual property rights has caused huge losses to the media industry. In an open network environment, the digital media industry urgently needs effective technical means to protect intellectual property rights and protect the commercial interests of digital content creators, publishers and distributors. ...

AI Technical Summary

Problems solved by technology

[0008] In summary, the current non-blind detection requires the original copy to participate in the fingerprint detection process, which is not conducive to rapid automatic detection. Although the blind detection does not require the participation of the original copy, the detection accuracy is far lower than that of the non-blind detection.

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