高码率视频组播的轻量级签名非均匀认证保护  

Unequal authenticity protection for light signature scheme in high-bitrate video multicast

作　　者：宋磊[1,2] 王劲林[1] 王玲芳[1] 陈君[1] 

机构地区：[1]中国科学院声学研究所国家网络新媒体工程技术研究中心,北京100190 [2]中国科学院大学,北京100039

出　　处：《计算机应用研究》2013年第11期3380-3384,共5页Application Research of Computers

基　　金：国家自然科学基金资助项目(60972082);国家科技支撑计划资助项目(2011BAH11B05);中国科学院战略性先导科技专项基金资助项目(XDA06010302)

摘　　要：针对高码率视频直播系统中轻量级签名认证方案开销过大的问题,提出一种非均匀认证保护方法。利用视频编码的帧间依赖关系量化数据包的认证重要性,以数据包保密级别和证据取值范围为约束条件,差异化不同重要性和密钥周期阶段下数据包的证据份额,减少了认证证据的消耗和认证异常的损失。仿真分析表明,在预设数据包保密级别为2112时,认证信息的通信和计算开销分别下降了67.0%和68.3%,可以满足10 Mbps视频组播认证的安全和性能需求。In high-bitrate live system, due to existing light signature multicast authentication scheme＇s high overhead, this paper proposed an unequal authenticity protection method. This method weighted packet authentication importance by frame＇s dependencies in video coding, it constrainted packet security level and the range of evidence, differed evidence portion by authentication importance and evidence matrix consumption, which optimized evidence consumption and the loss of abnormal authentication. The simulation results show that given packet＇s amortized security level is 2112, communication and computation cost decline by 67. 0% and 68. 3%, meets the needs of authenticating 10 Mbps video multicast stream.

关 键 词：组播认证 轻量级签名 非均匀认证保护 高码率视频 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]