计算机科学 ›› 2015, Vol. 42 ›› Issue (4): 72-75.doi: 10.11896/j.issn.1002-137X.2015.04.013
周 璇,宦国强,宋占杰
ZHOU Xuan, HUAN Guo-qiang and SONG Zhan-jie
摘要： 近年来,基于对等网络(Peer-to-Peer,P2P)的视频点播(Video-on-Demand,VoD)作为付费网络电视业务的一种新趋势受到了越来越多的关注,然而对等网络自身存在的不稳定性、异构性等缺陷,导致这种系统存在较大的信息安全隐患,从而严重阻碍了其推广使用。基于P2P网络的机顶盒VoD系统条件接收机制分析了现有系统的不安全因素及问题症结,提出了一种适用于P2P网络的VoD系统动态双向条件接收(Conditional Access,CA)机制,通过采用双向认证协议来保证通信双方身份的可靠性。同时在身份认证中可以结合密钥协商,生成用于传输控制字的业务密钥。另外,在简化设计的同时,也进一步提高了系统的安全性。
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