计算机工程与应用 ›› 2008, Vol. 44 ›› Issue (10): 104-105.

• 网络、通信、安全 • 上一篇    下一篇

一个安全的(tn)门限代理签名

田志刚,鲍皖苏   

  1. 解放军信息工程大学 电子技术学院,郑州 450004
  • 收稿日期:2007-09-20 修回日期:2007-12-03 出版日期:2008-04-01 发布日期:2008-04-01
  • 通讯作者: 田志刚

Secure(tn) threshold proxy signature scheme

TIAN Zhi-gang,BAO Wan-su   

  1. Institute of Electronic Technology,Information Engineering University of PLA,Zhengzhou 450004,China
  • Received:2007-09-20 Revised:2007-12-03 Online:2008-04-01 Published:2008-04-01
  • Contact: TIAN Zhi-gang

摘要: 在一个(tn)门限代理签名方案中,任何t个成员组成的集合可以代表原始签名人进行代理签名,而任何少于t个成员的集合都不能进行代理签名。针对合谋攻击提出了一个安全的(tn)门限代理签名方案。合谋攻击是指在不知道任何有效的门限代理签名的情况下,恶意代理成员人数大于或等于门限值时,他们能合谋重新构造代理群的秘密参数,从而可以伪造其他代理成员的签名。新方案不仅能满足门限代理签名的性质,而且能抵抗合谋攻击。

关键词: t, n)门限代理签名, 可信中心, 合谋攻击

Abstract: In a(tn) threshold proxy signature,any set of t members who present the original singer can issue a signature while any set of less than t members can not issue a signature at all.A secure(tn) threshold proxy signature scheme is proposed aiming at conspiracy attack.That is:any t or more malicious proxy signatures may work together to reconstruct the secret keys of other members in proxy group,consequently they can impersonate some other proxy signers to generate a valid threshold proxy signature.The new scheme can not only satisfy the properties of the threshold proxy signature,but also withstand the conspiracy attack.

Key words: t, n) threshold proxy signature, trusted party, conspiracy attack