两种代理签名方案的分析与改进  

Security analysis and improvement of two proxy sgnature schemes

作　　者：施荣华[1] 汪秋国[1] 胥磊[1] 

机构地区：[1]中南大学信息科学与工程学院,长沙410083

出　　处：《计算机工程与应用》2007年第28期127-130,共4页Computer Engineering and Applications

基　　金：国家自然科学基金(the National Natural Science Foundation of China under Grant No.60173041);湖南省自然科学基金(the Natural Science Foundation of Hunan Province of China under Grant No.02JJY2094)

摘　　要：对Dai等人的指定接收人的代理签名方案和Xue等人的采用自我认证公钥的门限代理签名方案进行了密码分析,发现它们是不安全的,都不能抵抗伪造攻击。针对这两个方案的缺陷,对其进行了改进,改进后的方案满足了代理签名的安全性要求。In this paper,through the cryptanalysis of Dai et al. designated-receiver proxy signature scheme and Xue et al. threshold proxy signature scheme using self-certified public keys,it is found that these schemes were both insecure against the forgery attack.To eliminate the weakness of two schemes,improved schemes which satisfy the required secure properties of the proxy signature are proposed,respectively.

关 键 词：代理签名 伪造攻击 安全分析 门限签名 指定接收人签名 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]