代理盲签名的不可跟踪性分析

Analysis on Untraceability of Proxy Blind Signature

张学军在《基于身份的代理盲签名方案的分析与改进》(《计算机工程》,2009年第23期)一文中分析指出,农强等的代理盲签名方案(《计算机应用》,2008年第8期)不具有不可跟踪性。对此,通过反证法证明张学军的方法有误,在此基础上提出一种新的分析方法,利用其证明胡江红的方案(《计算机工程与应用》,2007年第18期)不满足不可跟踪性,并对该方案进行改进,使其满足不可跟踪性且效率得到提高。

Zhang Xuejun pointed out Nong Qiang et al＇s proxy blind signature scheme did not satisfy the property of untraceability. This paper shows that the analysis method proposed by Zhang Xuejun is wrong, and presents a new analysis method for verifying untraceability. The method is used to prove that Hu Jianghong et al＇s scheme does not satisfy the property of untraceability. Hu Jianghong et al＇s scheme is improved to make it satisfy the property of untraceability and enhance its efficiency.