基于Weil配对的口令认证组密钥交换协议  

Password authenticated group key exchange protocol based on Weil pairing

作　　者：李国敬[1,2] 苏晓曦[1] 温涛[1] 

机构地区：[1]东北大学信息科学与工程学院,沈阳110004 [2]中央烟台市委党校行政管理教研室,山东烟台264000

出　　处：《沈阳工业大学学报》2011年第3期299-302,314,共5页Journal of Shenyang University of Technology

基　　金：国家自然科学基金资助项目(60833004)

摘　　要：针对以往组密钥交换协议中存在的计算效率和安全性方面的问题,提出一种基于Weil配对的口令认证组密钥交换协议.将三叉逻辑密钥树结构与Weil配对相结合,使用简单的点乘运算和双线性配对运算来替代复杂的求幂运算,经过3轮通信来完成组密钥的建立和认证过程,实现安全的密钥交换.实验结果表明,该算法降低了逻辑密钥树的高度和复杂性,进一步提高了计算效率.在安全性方面,能够抵抗在线和离线字典攻击等一系列干扰,具有向前安全性.Aiming at such problems as computing efficiency and security in previous group key exchange protocols, a Weil pairing-based password authenticated group key exchange protocol was presented. The ternary logic key tree was combined with Weil pairing, and the complicated exponentiation was replaced by simple point multiplication and bilinear paring operations. The construction and authentication of group key were finished after three turns of communication. The experiment results show that the algorithm reduces the height and the complexity of logic key tree and enhances the computation efficiency. In the security aspect, the protocol can resist on-line and off-line dictionary attacks, and has the forward security.

关 键 词：安全协议 口令认证 组密钥交换 WEIL配对 身份认证 逻辑密钥树 点乘 字典攻击 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]