Computer Engineering and Applications ›› 2010, Vol. 46 ›› Issue (1): 84-86.DOI: 10.3778/j.issn.1002-8331.2010.01.027

• 网络、通信、安全 • Previous Articles     Next Articles

Improvement of (tn) threshold signature scheme without trusted party

GAO Wei1,YU Xiao-dong2   

  1. 1.Department of Mathematics and Computer,Harbin Normal University Star College,Harbin 150025,China
    2.College of Computer,Harbin Normal University,Harbin 150025,China
  • Received:2008-07-21 Revised:2008-10-20 Online:2010-01-01 Published:2010-01-01
  • Contact: GAO Wei

对一个无可信中心的(tn)门限签名方案的改进

高 炜1,于晓冬2   

  1. 1.哈尔滨师范大学恒星学院 数学与计算机系,哈尔滨 150025
    2.哈尔滨师范大学 计算机学院,哈尔滨 150025
  • 通讯作者: 高 炜

Abstract: In a (tn) threshold signature scheme,any set of t players can signature for an arbitrary message while any set of less than t players can not issue a signature at all.The secret key is distributed among n parties with the help of a trusted party or without it by running an interactive protocol among all parties.In 2006,Guo et al. pointed out that the scheme is insecure by analyzing the scheme of Wang et al.The paper improves Wang et al’s scheme and avoids universally forging signature and insider attack.

Key words: digital signature, threshold signature, secret sharing, insider attack, universally forging attack

摘要: 一个(tn)门限签名方案中,任何t个成员的集合能够对任意的消息产生签名而任何少于t个成员的集合都不能发行签名。其中密钥通过可信中心或没有可信中心,通过所有的成员运行交互式协议在n个成员中分配。2006年,郭丽峰对王斌等的方案进行了安全性分析,指出王等的方案是不安全的,该文对王的方案进行了改进,使其抗广泛性攻击及内部攻击。

关键词: 数字签名, 门限签名, 秘密共享, 内部攻击, 广泛性攻击

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