基于对等网络的大规模视频安全组播协议  

Secure multicast protocol for large-scale streaming media over P2P networks

作　　者：张江[1] 罗建光[1] 杨士强[1] 

机构地区：[1]清华大学计算机科学与技术系,北京100084

出　　处：《清华大学学报（自然科学版）》2008年第10期1663-1666,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(60432030);国家"九七三"基础研究基金项目(2006CB303103)

摘　　要：为了解决现有的对等网络流媒体组播方案缺乏安全通信机制的问题,提出了一种基于对等网络的大规模视频安全组播协议(P2P-SMP)。该协议第一次给出了基于随机传播和数据驱动对等网络的安全视频组播方案,通过将密钥更新消息嵌入于流调度协议在节点间通过接力的方式传递,不需构建专门的密钥分发网络,并可提高密钥分发的可靠性和保证密钥与视频数据的同步性;通过采用批量密钥更新方案,可以进一步降低用户频繁加入/退出导致的密钥更新开销。A secure multicast protocol （SMP） for large-scale streaming media over peer-to-peer （P2P） networks, P2P-SMP, was developed to address the challenges of adding confidentiality to P2P multicasts. The protocol includes a secure multicast scheme for the pull-based data-driven P2P multicast protocol. By embedding the rekeying message into the streaming protocol, the protocol does not need a special key distribution network, thus making the key distribution more reliable and guaranteeing that the updated group key is always received by the group members ahead of the encrypted data. In addition, the protocol employs a group batch rekeying scheme, which further reduces the group rekeying overhead in a highly dynamic environment.

关 键 词：数据安全 组密钥管理 对等网络组播 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]