The Research On Anonymous Digital Fingerprinting Technology

With the development of the Internet and E-Commerce, Multimedia products and software products with digital formats will be transmitted as the mainstream in the networks. Because digital products are easily copied and pirated, this will discourage the enthusiasm of the media provider and software producers. The basic idea of the digital fingerprinting is to embed unique hidden information, which likes the fingerprinting of human being into each copy of the product. When the pirate copy is found, the merchant can trace the source of the pirate through the digital fingerprinting. Digital fingerprinting technology can be divided into three basic patterns: symmetric fingerprinting, asymmetric fingerprinting and anonymous fingerprinting. Anonymous fingerprinting not only protects the buyers'privacy, but also guarantees the rights of the buyer and seller. So it has become the hot research field in digital rights protection.As a main topic, anonymous digital fingerprinting technology and related anonymous technologies are thoroughly discussed in this thesis. When the digital distributors and registration center collusion, the identity of the user can be leak reveal. This thesis solves this problem effectively.Firstly, this thesis briefly introduces the conception of digital anonymous fingerprinting and the related knowledge of cryptography, and then a group signatures scheme is proposed with formal definition and rightness discussion, an anonymous authentication scheme and security model definition are based on this group signatures scheme. Based on the former research, a digital anonymous fingerprinting scheme in the P2P environment is proposed with analysis of the efficiency. Finally, this thesis discusses the research and application of anonymous digital fingerprinting technology in the future.