Robust And Fault-Tolerant Key Management in Large Dynamic Multicast Group
鲁棒且容错的大型动态组播系统的密钥管理

Current research activities on the problem of key management in group communication system include tow areas: one to solve the problem of key updating and distribution in large dynamic multicast groups; another to solve the problem of key agreement in the DPGs(dynamic peer groups). The two research areas are independent with each other. In this paper, we show a new research direction, under which we can effectively combine the corresponding techniques in these two fields to solve new problems, and also give a good demonstration that through combining the GDH techniques of key agreement in DPGs and our techniques of key management in large dynamic multicast groups, we present a robust and fault.tolerant key management protocol suite in large dynamic multicast group. The protocol suite solve the problem of SPOF(single point of failure)which universally exists in center.oriented key management protocols and is robust and fault.tolerant.