Research On Traitor Tracing Techniques

With the rapid development of IT digital technology and electronic commerce, the digital right management of digital products (Pay-TV, network multimedia, etc.) based on broadcast encryption services has become a key issue to be solved and a present research topic as well. Traitor tracing technology is an efficient method employed for data provider to trace and identify traitors and to protect his benefit in case of suffering from collusion attack or redistribution attack.In this paper, our attention is focused on bilinear-map based and large integer factoring problem based traitor tracing schemes. The mainly obtained results are as follows:1. The first aspect is about the background and significance of researches on traitor tracing technology. Two general models of traitor tracing systems which are based on the key distribution and management problem and watermarking problem respectively are given. Present development of traitor tracing technology is summarized.2. Traitor tracing schemes based on bilinear map, as well their performance analysis, are described in detail, and a new efficient Identity-based traitor tracing scheme is proposed.3. Describing a traitor tracing scheme and an efficient Pay-TV scheme both are based on large integer factoring problem in depth. Constructing a practical Pay-TV scheme based on Chinese Remainder Theorem and ElGamal encryption, and presenting a tracing algorithm that can trace all the traitors contributing to the pirate.