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具有强匿名性的网关口令认证密钥交换协议

An Efficient Gateway-Oriented Password-Based Authenticated Key Exchange Protocol with Strong User Anonymity
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摘要 网关口令认证密钥交换协议允许用户和网关在服务器的协助下建立起一个共享的会话密钥,其中用户和服务器之间的认证通过低熵的口令来完成.已有的网关口令认证密钥交换协议对用户的匿名性研究不足.该文基于Diffie-Hellman密钥交换提出了具有强匿名性的网关口令认证密钥交换协议,并且在随机预言模型下基于标准的DDH假设证明了协议的安全性.新协议可以抵抗不可检测在线字典攻击并且计算效率高,安全性和计算效率都优于已有的同类协议. Gateway-oriented password-based authenticated key exchange （GPAKE） protocol al- lows a client and a gateway to establish a common session key with the help of an authentication server, where the authentication between the client and the server is done via a low-entropy pass- word. The approach of designing GPAKE protocols with user anonymity is far from maturity and perfection. This paper presents a GPAKE protocol with strong user anonymity based on the Dif- fie-Hellman key exchange, and then proves its security under the standard DDH assumption in the random oracle model. The new protocol can resist the undetectable on-line dictionary attack and is quite efficient in terms of computation. Compared with other related protocols, the new protocol is more secure and efficient.
作者 魏福山 马传贵
机构地区 信息工程大学信息工程学院信息研究系
出处 《计算机学报》 EI CSCD 北大核心 2012年第9期1823-1832,共10页 Chinese Journal of Computers
关键词 口令认证 网关 匿名性 随机预言模型 DDH假设 password authentication gateway anonymity random oracle model： DDH assumption
分类号 TP309 [自动化与计算机技术—计算机系统结构]
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参考文献14

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二级参考文献16

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计算机学报
2012年 第9期

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