一个(t,n)门限代理签名的分析与改进  

Cryptanalysis and improvement of (t,n) threshold proxy signature scheme

作　　者：左振元[1] 谢琪[2] 

机构地区：[1]杭州师范大学信息科学与工程学院,杭州310036 [2]杭州师范大学研究生学院,杭州310036

出　　处：《计算机工程与应用》2010年第21期119-121,共3页Computer Engineering and Applications

基　　金：浙江省自然科学基金No.Y105067~~

摘　　要：指出田志刚等提出的(t,n)门限代理签名方案存在3个缺陷,首先无法抵抗合谋攻击;其次,无法抵抗伪造攻击;第三,无法抵抗原始签名人的伪造攻击。为克服原方案的缺陷,给出了改进方案。It is shown that Tian Zhi-gang et al＇s（t,n）threshold proxy signature scheme exists three flaws.The first one is that their scheme cannot resist the conspiracy attack;the second one is that their scheme cannot resist the forgery attack;the third is that their scheme cannot resist the original signer＇s forgery attack.To overcome the security flaws,an improvement scheme is proposed.

关 键 词：门限签名 门限代理签名 合谋攻击 伪造攻击 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]