基于单向密钥链树的组播密钥更新协议

分析基于层次K叉树(HKT)的组播密钥更新协议,提出了组员加入和离开通信组时,基于单向密钥链树(OKCT)的组播密钥更新协议,分析了该协议的性能.结果表明,在不增加组控制者和组员密钥存储空间的基础上,该协议将组员加入和离开通信组的密钥更新消息包数分别减少到logk n和(k-1)logk n-1,并且降低了组控制者加密和组员解密密钥更新消息的计算量.

Multicast Rekeying Protocol Based on One-Way Key Chain Tree

A multicast rekeying protocol is analyzed based on hierarchical K-ary tree (HKT) and a multicast rekeying protocol based on OKCT is proposed when a member joins and leaves the communication group. The protocol's performance is analyzed. The protocol keeps the group controller and members' key space, and decreases the number of rekeying messages when a member joins and leaves the communication group into log_k n and (k-1)log_k n-1, and decreases the quantity of computation when the group controller encrypts the rekeying message and the members decrypt the rekeying message.