基于混沌的视频流选择加密算法  

Chaos Based Encryption Algorithm for Compressed Video

作　　者：袁春[1] 钟玉琢[1] 贺玉文[1] 

机构地区：[1]清华大学计算机科学与技术系,北京100084

出　　处：《计算机学报》2004年第2期257-263,共7页Chinese Journal of Computers

基　　金：信息产业部国家重点攻关项目(19991118)资助

摘　　要：基于网络的多媒体流的安全加密技术正成为人们研究的热点 ,目前的算法在安全性和实时性上都各自存在缺点 ,文章通过针对压缩流的具体特性 ,采用混沌伪随机序列发生方法 ,将非对称公钥加密算法和流加密算法相结合 ,提出了基于混沌的选择性视频流加密算法 .通过密码分析、算法评估和具体试验效果分析 ,该算法具有较好的实时性、安全性和易实施性 .Researchers are concerning more and more on encryption algorithms of compressed video based on internet explosive multimedia applications. However, there are many drawbacks in current algorithms in respect of security and real-time performance. According to the characteristics of the compressed video, we adopt the chaos method as pseudorandom sequence generator, combine dissymmetric key system with the sequence cryptography system and present a chaotic selective encryption algorithm of compressed video (CSECV). CSECV has shown significant advantages on security, real-time performance and flexibility of implementation through a series of tests such as cryptoanalysis, algorithm evaluation and the comparison with other algorithms.

关 键 词：视频流选择加密算法 安全性 实时性 混沌理论 非对称公钥加密算法 多媒体数据 

分 类 号：TN919.8[电子电信—通信与信息系统]