Scalable Key management scheme based on member discovery protocol for IP multicast
一种基于成员发现协议的可扩展组播密钥管理方案

On the basis of analyzing existed schemes,a key management scheme based on member discovery protocol for IP multicast was proposed.Aiming at realistic Internet-like topologies,the member discovery protocol was embeded in our protocol to output a member overlay tree.The multicast group which consisted of all end-users was divided into some virtual subgroups by group-constructing algorithm.Logical Key Hierarchy(LKH) protocol was adopted to implement key management in every subgroup.The group key was distributed to all subgroup security controllers by the group security controller.The protocol was a two-level key management protocol.The improved protocol possesses better scalablity than other schemes,better performance about group rekeying and can be applied to large multicast group.