摘要： 安全的群组通信是网格环境下开展大量的协作与资源共享的必要手段。文章提出了一种基于证书的群组通信方案。一个通信群组由一个或者多个域组成，每个成员属于一个特定的域。群组通信所使用的密钥分为域内密钥和域间密钥。讨论了成员加入和退出时的动态密钥更新问题。

关键词: 网格；群组通信；密钥管理；域

Abstract: Secure group communication is a critical means to implement a great deal of collaboration and resource sharing in grid environment.This thesis brings out a novel group communication scheme based on digital certificate. A group is composed of one more domains and each member belongs to one specific domain. The keys used in a group involve intra-domain keys and inter-domain keys. This thesis discusses the issue of dynamic key refreshment when member joins or leaves as well.

Key words: Grid; Group communication; Key management; Domain