一种适合大型动态多播的密钥管理方案

分析了已有基于两层结构的密钥管理方案的优缺点，在此基础上综合了上述方案和PE方案的特点，提出了一个新的密钥管理方案，并给出了相应的更新算法。通过对本方案和其他方案的密钥存储量、加密计算量、网络通信量等性能的分析结果表明，该方案在组控制器和子组控制器方面都具有良好的通信效率、较低的计算开销和可扩展性，适用于大型的动态多播环境。

Key management scheme for large and dynamic multicast groups

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.