基于椭圆曲线密码体制的可认证的密钥协商设计与分析  

DESIGN OF AUTHENTICATED KEY AGREEMENT BASED ON ELLIPTIC CURVE CRYPTOSYSTEM AND ITS ANALYSIS

作　　者：谢绒娜[1] 李凤华[1] 欧海文[1] 李晓东[1] 

机构地区：[1]北京电子科技学院,北京100070

出　　处：《计算机应用与软件》2010年第8期52-54,共3页Computer Applications and Software

基　　金：国家高技术研究发展计划(2007AA01Z472);国家自然科学基金(60633020;60573036)

摘　　要：椭圆曲线密码体制以其密钥短、安全强度高、速度快等优越性被广泛用于进行构建数字签名和用户身份认证方案。同样,它也可以用来构建密钥交换协议。Diffie-Hellman密钥协商协议对来自中间人的攻击是脆弱的。基于椭圆曲线离散对数难解性,利用椭圆曲线密码体制的数字签名方案,提出了基于身份认证的密钥协商协议。该协议提供身份认证、密钥确认、完美前向安全性,并能够防止中间人攻击。Elliptic curve cryptosystem is widely used in digital signature construction and user authentication scheme due to its superiorities of short of the key,high security and high speed, etc. Also it can be used to construct key exchange protocol. The Diffie-Hellman key agreement protocol is vulnerable to intermediate attack. This paper proposes an ID authentication-based key agreement protocol by using the elliptic curve cryptosystem digital signature scheme. The security of this protocol relies on the intractability of elliptic curve discrete logarithm. The protocol can provide identity authentication, key validation,perfect forward security, and defend man-in-the-middle attacks.

关 键 词：椭圆曲线密码 椭圆曲线离散对数 DIFFIE-HELLMAN密钥协商 可认证的密钥协商 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]