Key management scheme for large and dynamic multicast groups
一种适合大型动态多播的密钥管理方案

Some existing key management schemes based on two-layered architecture were analyzed and their pros and cons were discussed. On the basis of integrating the characters of these methods and PE scheme, a new key management scheme was proposed and its rekey algorithm was designed. Through the comparison of key storage cost, computation complexity and communication efficiency between the scheme presented in this paper and other schemes, it is show that this scheme possesses a good communication efficiency and scalability, and it lowers the computation cost, thus can be applied to large multicast group.