组播通信的访问控制和密钥管理

IP组播是一种高效的多目标传输机制.随着网络的发展,组播在网络的应用占据着越来越重要的地位,其应用不断扩展,技术日益成熟.目前,组播作为一个崭新的学术研究领域,在组播路由算法、流量控制、可靠传输等方面的研究已有很多成果,而对于组播安全问题的研究特别是组播通信密钥的研究还很不成熟.本文通过研究绀播通信安全进行深入的研究,对比各种密钥管理方法,研究了可扩展的密钥管理方法.该密钥管理体系采用分层管理结构,采用子管理中心对各个子域进行管理,不仅可以高效地处理组播组成员动态加入和退出,同时,大大减少了密钥管理中心的负担.使该方法可以应用于大型、动态的组播系统.此外,该方法根据现有的网络和组播系统的要求,提出了控制中心由计算机组进行统一调度管理,避免了单点故障的问题,增加了系统的鲁棒性.

Access Control and Group Key Management of IP Multicast

IP multicast is an efficient mufti-agent transport protocol. With the development of network, multicast will be morn and more important. Applications of multicast will be used in many areas..9s a fresh new thriving academic field, the main research is focused on multicast routing, the flow control, the congestion control and reliable multicast. But there are few results referred to mufticast security especially to group key management. In this paper, it will submit a scheme of group key management for large dynan vc multicast system.This scheme adopts hierarchical architectme,includes a control-center (main key management center: KMC) which is composed of a cluster of computers, and some sub key management center(SKMC) which manages its sub-domain.The scheme can efficiently handle the joining and leaving of group members and avoid one-point failure.It also enhances the robustness of the manage system.