【作者】 杨晨；

【导师】 王新梅；

【作者基本信息】 西安电子科技大学 ， 通信与信息系统， 2006， 硕士

【摘要】 随着IT数字技术和电子商务的迅猛发展,诸如付费电视、网络多媒体等基于广播加密业务的数字产品的版权保护逐渐成为一个迫切需要解决的关键问题,成为目前的一个研究热点。叛逆者追踪技术是在数据供应商可能遭遇共谋攻击或非法重放攻击时为保护自己的利益所采用的一种可追踪及识别叛逆者的广播加密方案。本文主要对基于双线性映射的叛逆者追踪方案和基于大整数分解困难行的叛逆者追踪方案作了深入研究,主要内容包括以下几个方面:1.介绍叛逆者追踪技术研究的背景和意义,分别给出了基于密钥分配和管理的叛逆者追踪系统和基于水印的叛逆者追踪系统的通用模型,概述了叛逆者追踪技术的发展现状;2.详细介绍了几个基于双线性映射的叛逆者追踪方案,深入研究分析和比较了它们各自的性能,并提出了一个新的基于身份的叛逆者追踪方案;3.介绍了一个基于大整数分解的叛逆者追踪方案和一个有效的付费电视方案,对两个相关方案分别进行了深入的研究和性能分析;构造了基于中国剩余定理和离散对数结合的实用的付费电视方案,并提出了一个可以追踪所有叛逆者的追踪算法。更多还原

【Abstract】 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.更多还原