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 (tn)threshold proxy signature scheme

ZUO Zhen-yuan1,XIE Qi2   

  1. 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(tn)门限代理签名的分析与改进

左振元1,谢 琪2   

  1. 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: It is shown that Tian Zhi-gang et al’s(tn)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(tn)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

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