一个基于辫群的密钥认证方案的安全分析  

Cryptanalysis Key Authentication Scheme Based on Braid Group

作　　者：洪东招[1] 

机构地区：[1]杭州师范大学理学院,浙江杭州310036

出　　处：《杭州师范大学学报（自然科学版）》2010年第2期107-110,共4页Journal of Hangzhou Normal University(Natural Science Edition)

摘　　要：密钥认证是保证用户的公钥不被伪造.文章指出卓等人提出的基于辫群的密钥认证方案易受公钥替换攻击.通过修改他们所提方案中注册和证书的生成和认证阶段算法,提出了一个改进的密钥认证方案.该方案在公钥替换攻击下是安全的,并且满足其他安全需求.Key authentication assures that the public key of user can-not be forged.This paper shows that the key authentication scheme based on braid group which is provided by Zhou and others is liable to public key substitution attack and proposes an improved key authentication scheme which revises the user registration and certificate generation phase and key authentication phase algorithms of it.The scheme is secure against the public key substitution attack and satisfies other essential security requirements.

关 键 词：密钥认证 不可否认性 辫群 

分 类 号：TP309.08[自动化与计算机技术—计算机系统结构]