计算机工程与应用 ›› 2008, Vol. 44 ›› Issue (13): 120-121.

• 网络、通信、安全 • 上一篇    下一篇

一些代理签名方案的进一步改进

黄文平1,高茂庭2   

  1. 1.南昌陆军学院 科文教研室,南昌 330103
    2.上海海事大学 计算机系,上海 200135
  • 收稿日期:2007-11-05 修回日期:2008-01-07 出版日期:2008-05-01 发布日期:2008-05-01
  • 通讯作者: 黄文平

Further improvement of some proxy signature schemes

HUANG Wen-ping1,GAO Mao-ting2   

  1. 1.Nanchang Military Academy,Nanchang 330103,China
    2.Computer Science Department,Shanghai Maritime University,Shanghai 200135,China
  • Received:2007-11-05 Revised:2008-01-07 Online:2008-05-01 Published:2008-05-01
  • Contact: HUANG Wen-ping

摘要: 对两个不需要安全信道的代理签名方案进行了分析,发现它们并不满足不可伪造性。在[4]中不能抵抗原始签名人改变攻击,在[5]中原始签名人可以伪造一个有效的代理签名。提出一个改进的强代理签名方案,新方案在不增加计算复杂性的前提下,保证了签名的安全性,同时代理授权过程中仍然保持不需要安全信道。

关键词: 数字签名, 代理签名, 伪造攻击

Abstract: This paper analyzes two public channel proxy signature schemes,we point out that both schemes are insecure;the scheme of [4] can’t resist the change original signer attack.In the scheme of [5],original signer can successfully forge a valid proxy signature scheme.A new public channel signature scheme is proposed.Analysis shows that the proposed scheme satisfies all security properties of the strong proxy signature scheme.

Key words: digital signature, proxy signature, forgery attack