An Efficient Key Agreement Scheme for Dynamic Secure Multicast
高效的动态安全组播密钥协商方案

IP Multicast provides an efficient mechanism for a sender to send messages to multiple receivers simultaneously. One of the main requirements for the realization of secure multicast is the design of efficient key management schemes. In this paper, we propose a new identity-based key agreement scheme for dynamic multicast groups using bilinear pairings. The procedures of secret communications between subgroups and the updating of group keys with the dynamic change of group members are analyzed in detail, when the newly proposed key agreement scheme is employed in multicast communication. The analysis shows our scheme is not only efficient in computation and communication and also satisfies all the security requirements of key agreement for multicast.