基于IP组播的安全通信技术研究

IP组播是一种实现单点发送多点接收的高效通信技术，但是组播通信的安全问题阻碍其被广泛应用。介绍IP组播面临的主要安全问题及应采用的安全通信技术，研究组播安全机制中的核心问题密钥管理，提出一种混合式组播密钥管理框架，有效避免单点故障，增加系统的健壮性。提出基于子组密钥的组密钥管理简化策略和密钥更新算法，有效解决组播组成员动态加入和退出组播组的问题，并减少密钥管理中心的负担。

The research on secure communication technics based on IP multicast

IP multicast is an efficient communication technic to send a message to multiple receivers. But the security of multicast hinders it＇s wider application. The principal problem that multicast confronted with and secure communication technics that should be adopted were recommended. Key management that the core issue of multicast security mechanism was studied. A mixed architecture of group key management was submitted. The architecture can efficiently avoid single-point fault, and enhances the robustness of the system. Then group key managenent simple policy based on subgroup key management and updating algo-rithm were brought out. Especially, group members＇ joining and leaving can be efficiently handled, the burdens of key management center were reduced too.