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

doi:10.3778/j.issn.1002-8331.2010.21.033

Computer Engineering and Applications ›› 2010, Vol. 46 ›› Issue (21): 119-121.DOI: 10.3778/j.issn.1002-8331.2010.21.033

• 网络、通信、安全 • Previous Articles Next Articles

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

ZUO Zhen-yuan¹，XIE Qi²

1.School of Information Science and Engineering，Hangzhou Normal University，Hangzhou 310036，China
2.Graduate School，Hangzhou Normal University，Hangzhou 310036，China

Received:2009-01-06 Revised:2009-03-20 Online:2010-07-21 Published:2010-07-21
Contact: ZUO Zhen-yuan

一个（t，n）门限代理签名的分析与改进

左振元¹，谢琪²

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

通讯作者: 左振元

Abstract

Abstract: 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.

Key words: threshold signature, threshold proxy signature, conspiracy attack, forgery attack

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。

关键词: 门限签名, 门限代理签名, 合谋攻击, 伪造攻击

CLC Number:

TP309

ZUO Zhen-yuan¹，XIE Qi². Cryptanalysis and improvement of （t，n）threshold proxy signature scheme[J]. Computer Engineering and Applications, 2010, 46(21): 119-121.

左振元¹，谢琪². 一个（t，n）门限代理签名的分析与改进[J]. 计算机工程与应用, 2010, 46(21): 119-121.

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

一个（t，n）门限代理签名的分析与改进

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