摘要
在一个大型动态多播群组中,提高组密钥更新效率是一个具有挑战性的难题.分析现存组密钥管理方案的基础上,提出了一种新的组密钥分发协议,该协议使用了异或运算和伪随机函数,使得逻辑密钥树上的密钥呈现出规律性,从而降低了存储量、通信量和计算代价,同时还引入了两个变量将密钥的更新过程分为必要更新与辅助更新两大部分.最后,对协议的安全性进行了分析,并从存储复杂度,通信复杂度和计算量三方面对协议的性能进行了评估.
It is a big challenging problem to improve the efficiency of Group Rekeying in a large dynamic group. A new group key distribution agreement is proposed based on the analysis of the existing group key schemes, it uses the XOR operation and pseudo-random function, etc, making the logical key tree showing the key regularity, thereby reducing the amount of storage, communications and computing costs. At the same time,the introduction of two variables divides the key update process into two parts：the necessary update and the auxiliary update. Finally,the safety of the protocol is analyzed and an assessment of the performance is made from the storage complexity, communication complexity and computations.
出处
《小型微型计算机系统》
CSCD
北大核心
2010年第10期2030-2033,共4页
Journal of Chinese Computer Systems
基金
中华女子学院2009年度科研规划课题阶段成果(KG09-02001)
关键词
组播通信
安全组播
组密钥更新
单向函数
异或运算
multicast communication
secure multicast
group key update
one-way function
XOR operation
