基于口令的高效语义安全的密钥交换  

EFFICIENT AND SEMANTICALLY SECURE PASSWORD-BASED KEY EXCHANGE PROTOCOL

作　　者：王立斌[1] 潘嘉昕[1] 马昌社[1] 

机构地区：[1]华南师范大学计算机学院,广东广州510631

出　　处：《华南师范大学学报（自然科学版）》2010年第2期40-44,58,共6页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(60703094)

摘　　要：仅借助Hash函数和异或运算,构造了一种高效、可证明安全的基于口令的密钥交换协议.在随机预言模型下,该协议的安全性可紧致归约到计算Diffie-Hellman难题上,从而证明该协议是语义安全的,并能对抗离线字典攻击.最后,与同类协议相比,该协议显示出更高的执行效率与通信效率.An efficient and provably secure password-based key exchange protocol is proposed,using only hash function and XOR operator.The security of the protocol can be tightly reduced to the hardness of the computational Diffie-Hellman problem in random oracle model.Thus,the protocol is proved to be semantically secure against off-line dictionary attacks.Finally,compared with the related works,the protocol is more efficient with respect to computation and communication.

关 键 词：基于口令的密钥交换 语义安全 可证明安全 随机预言模型 DIFFIE-HELLMAN假设 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]