项目名称： 多媒体数字指纹若干关键技术研究

项目编号： No.61202464

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 计算机科学学科

项目作者： 胡德发

作者单位： 湖南商学院

项目金额： 24万元

中文摘要： 作为一种新型的多媒体版权保护技术，数字指纹通过在每份多媒体拷贝中秘密地嵌入一个唯一的、称之为指纹的序列码来实现版权保护与盗版者追踪。当设计多媒体指纹系统时，有三个关键问题首先需要解决：(1)抵抗用户之间的合谋攻击；(2)把大量内容相同但嵌入了不同指纹的拷贝有效地分发给大量不同的用户；(3)同时保障内容提供商与用户的安全性与公平性。本项目结合编码理论、数字水印、图像处理以及密码学等相关理论对数字指纹的三个关键问题展开系统地研究：(1)在对现有指纹编码方案抗合谋性能进行分析的基础上，设计出高性能的抗合谋指纹编码方案，以抵抗多个用户之间的合谋攻击；(2)设计出安全客户端指纹嵌入算法，把指纹拷贝的生成过程从内容提供商移到客户端，以降低内容提供商的负担；(3)利用多播及点对点等网络技术设计出有效的指纹拷贝分发方案，以降低带宽需求；(4)设计出有效的非对称指纹方案，以保障内容提供商与用户双方的权益。

中文关键词： 数字版权保护；数字指纹；信息隐藏；抗合谋攻击；叛逆者追踪

英文摘要： As a new technology for protecting copyright of multimedia data, digital fingerprinting achieves piracy tracing and copyright protection by embedding a unique serial number called fingerprint into each distributed multimedia copy secretly. Once an unauthorized content copy is discovered somewhere, the embedded fingerprint can uniquely identify the source of the pirated copy. When designing multimedia fingerprinting systems, three key problems should be considered. Firstly, how to resist the collusion attack launched by some malicious users. Secondly, how to distribute these different marked copies to different users efficiently. Thirdly, how to guarantee the security and fairness of both the content provider and users. This research combines coding theory, digital watermarking techology, image processing and cryptography theory to study the multimedia digital fingerprinting technology systematically. Firstly, on the basis of analysis and comparison of existing known fingerprinting encoding schemes, designing high performance anti-collusion fingerprinting codes to resist the collusion attack launched by some malicious customers. Secondly, designing a secure client side fingerprint embedding algorithm that the generation process of fingerprinted copy is moved from the content provider side to the client side to re

英文关键词： digital copyright protection；digital fingerprinting；information hiding；anti-collusion attack；traitor tracking