New Research on Multicast Key Management Scheme
组播密钥管理方案的新研究

After some deeply research on kinds of secure multicast key management schemes,a completely new way which not only improve the efficiency but also minimize users' keys storage is proposed.This scheme has pretty good flexibility as well.The scheme works like this: No matter how many users logout or login,the Group Controller(GC) need not send any re-keying messages,and although the GC changes the DEK(Data Encryption Key),users can decrypt these messages with there(pre-)(vious) private keys.This paper also presents a realization for the proposition.