Method for protecting digital product based on asymmetric digital fingerprint and system thereof

Abstract

The invention discloses an asymmetric digital fingerprint generation method and a method for protecting a digital product based on the method and a system thereof. The method comprises the following steps: a digital fingerprint center of a third-party credible authority generates a codebook of digital fingerprint codes according to performance requirements of a product releaser; a user provides an authenticated public key to a registration center and applies a registration number for buying digital products and the registration center uses the public key to encrypt the registration number and then sends the encrypted registration number to the user; the user buys the products from the releasers; and the digital fingerprint center inserts digital fingerprint to the products to be released and then releases the digital products to the user; and the digital fingerprint center tracks pirates for the pirated products and the credible authority feeds back the tracked results to the releasers. The invention optimizes code length coefficients of fingerprint codes, reduces the influence to the digital products under the condition of meeting the requirements of the product releasers and reduces storage expenditure of the fingerprint center. The user information is not public to the releasers, thus reducing the possibility for misjudging the pirates.

Description

technical field [0001] The invention relates to a copyright protection method for digital products, in particular to a copyright protection method and system for digital products based on asymmetric digital fingerprint generation, embedding and piracy tracking. Background technique [0002] In recent years, the rapid development of information technology and the wide application of e-commerce based on it have gradually expanded the spread of digital products and brought convenience. At the same time, the piracy of original products has also become very serious, including illegal copying and distribution. . Piracy damages the interests of digital product owners, including product content creators, publishers, distributors, etc. How to carry out copyright protection on digital products has become one of the focuses in the digital age. [0003] Digital watermark technology and digital fingerprint technology are new digital product copyright protection technologies developed i...

AI Technical Summary

Problems solved by technology

[0008] In view of this, one of the main purposes of the present invention is to provide a digital product protection method and system based on asymmetric digital fingerprints, which is used to solve the problem of adopting general asymmetric digital fingerprint strategies combined with anti-collusion digital fingerprint coding technology and zero-knowledge protocols. The digital product protection method of complex cryptography has technical defects such as high computational complexity and poor practicability

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