一种改进的三方认证密钥协商协议  

An Improved Three-party Authenticated Key Agreement Protocol

作　　者：唐祚波[1] 缪祥华[1] 

机构地区：[1]昆明理工大学信息工程与自动化学院,昆明650500

出　　处：《计算机工程》2013年第6期174-176,180,共4页Computer Engineering

摘　　要：针对三方认证密钥协商协议容易遭受假冒攻击和中间人攻击的缺点,提出一种基于身份的三方认证密钥协商改进协议。该协议综合运用基于身份的密码学、椭圆曲线密码学和哈希函数技术建立用户之间的认证关系,以抵抗假冒攻击和重放攻击。分析结果表明,该协议基于CDH假设是可证安全的,与Tan改进协议相比,效率较高。Aiming at the disadvantages that 3-Party Authenticated Key Agreement（3-PAKA） protocols are vulnerable to the impersonation attack and the man-in-the-middle attack, an improved ID-based authenticated key agreement protocol for 3-party is proposed. The new protocol adopts ID-based cryptography, elliptic curve cryptography and hash function techniques. Analysis results show that the proposed protocol is provable secure under Computational Diffie-Hellman（CDH） assumptions in the standard model, and it can resist against the man-in-the-middle attack. Additionally, an efficiency comparison of the proposed protocol and other improved protocols is given, and the protocol is more efficient.

关 键 词：密钥协商 基于身份 中间人攻击 椭圆曲线 哈希函数 可证明安全 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]