辫群上密钥协商协议的改进与安全性分析  

Improvement and Security Analysis of Key Agreement Protocol on Braid Group

作　　者：左黎明[1] 刘二根[1] 汤鹏志[1] 徐保根[1] 

机构地区：[1]华东交通大学基础科学学院,南昌330013

出　　处：《计算机工程》2012年第6期142-144,共3页Computer Engineering

基　　金：国家自然科学基金资助项目(11061014);江西省教育厅青年科学基金资助项目(GJJ10129);江西省教育厅科研基金资助项目(GJJ10708)

摘　　要：对辫群上密钥协商协议进行安全性分析,指出该协议无法抵抗中间人攻击,在密钥协商协议基础上,提出一种改进的密钥协商协议。该协议在密钥协商的过程中,采用辫群上的数字签名进行认证,有效防止中间人攻击和重放反射攻击。分析结果验证了该协议的安全性。A security analysis of a key agreement protocol on the braid group is made. TBe key agreement protocol is not reliable because it can not resist man in the middle attack. The detailed attack method is given. On the basis of the original protocol, an improved braid key agreement protocol is presented. By using the signature scheme on braid groups in the key agreement authentication process, the improved protocol can prevent man in the middle attack and replay attack effectively. Analysis result proves the security of the scheme.

关 键 词：辫群 共轭搜索 密钥协商协议 数字签名 中间人攻击 重放攻击 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]