一种基于LKH的高效的组播密钥管理方案

An Efficient Group Key Management Based on LKH

为了提高组播密钥的安全性、减少密钥存储量、提高密钥更新效率,该文提出了一种基于逻辑密钥层次（LKH）的改进方案,该方案通过单向函数和随机数实现了对组密钥和组成员私钥的保护,提搞了组播密钥的安全性,同时每个成员可以用自己的私钥和随机数通过计算得到组密钥,成员变化时的密钥更新具体由组成员自己完成,从而减少了密钥存储量和提高了密钥更新效率。

In order to improve the security and reduce the storage and improve the efficiency of group key,this paper proposes an optimized scheme based on Logical Key Hierarchy（LKH）.This optimized scheme improved the security of group key by the use of unilateral function and random number.Every user can calculate encrypted key by oneself private and random number.When one user leave or join in,group key updated by herself.So the storage reduced and the efficiency of group key improved.