面向多媒体密域的客户端数字指纹同态化嵌入理论和技术研究

项目名称： 面向多媒体密域的客户端数字指纹同态化嵌入理论和技术研究

项目编号： No.61272453

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 自动化技术、计算机技术

项目作者： 叶登攀

作者单位： 武汉大学

项目金额： 79万元

中文摘要： 多媒体安全分发通常同时采用加密和水印技术。面对水印对象加密易实现，而在非安全环境下对密文嵌入水印却是难点问题。由于对安全隐私保护应用具有重要价值，包括密域水印在内的密域信号处理研究得以广泛关注。然而，当前多媒体密域水印缺乏感知理论模型指导而且算法构造存在束缚。为此本项目针对面向多媒体加密对象的客户端数字指纹同态化嵌入理论和技术展开研究。具体内容包括：研究感知编码条件下密域指纹系统理论模型；研究水印域与密域在感知条件下的互同态理论和技术；研究有效的多媒体(全)同态加密算法和密域指纹嵌入方法。本项目旨在揭示在感知理论条件下同态化密域特征对指纹系统各性能指标影响规律；水印操作和加密操作的互同态实现条件；并实现感知编码条件下有效的互同态密域指纹方案或基于（全）同态加密的指纹嵌入方法，为解决多媒体安全广播中的客户端指纹安全嵌入问题提供理论基础和技术支撑,并对密域信号处理研究的其它问题有重要启发意义。

中文关键词： 指纹；加密域；云计算；水印；安全分发

英文摘要： Encryption and watermarking are both adopted to secure the digital multimedia product disseminated from the sever to the client. It is easy to encrypt the watermarked data while it's not easy to embed watermarks into the encrypted data in some untrusted environments. Till now the problem of singal procesings in encyption domain has been attracted more intentions including the encryption domain watermarking due to its great importance to the privacy, security and trust of many applications in networks. However in multimedia security applications most of them are absent of perceptual theory model and have constraints within the algorithm design. In this proposal we aim at above problems and study a new Homomorphism based Client-side Fingerprinting in multimedia encryption domain. It includes that encryption domain fingerprinting system theory model combined with the perceptual coding, self-homomorphism theory and techniques of transfering watermarking domain and encryption domain with each other under the perceptual constraints, multimedia homomorphic encryption and full homomorphic encryption algorithm and the encryption domain fingerprint embedding method. Our purpose is to disclose the perceptual theory rule of every performance factor influencing each other in the fingerprinting sysytem according to different

英文关键词： fingerprint；encryption domain；cloud computing；watermarking；secure distribution