摘要
为确定代理签名者签名的准确时间,以及授权人能追踪接收代理签名消息者的身份,甘元驹等人提出了一种可追踪接收者的时控代理签名方案。该文给出的一种攻击方案表明他们的方案是不安全的,任何代理签名的接收者都可以假冒代理人对任意的消息生成有效的签名。同时,给出了一个改进方案,弥补了甘元驹等人的方案的安全性缺陷。
To achieve the proposes that the receiver can ascertain whether a proxy signature is created during the delegation period,and the original signer can trace who actually have received the proxy signature,Gan et al propose a time-stamped proxy signature with traceable receiver.However,their scheme is insecure by presenting a forgery attack,any receiver can impersonate the proxy signer to sign any message without holding the responsibility.To overcome the weakness,a modification to Gan et al's scheme can satisfy the security requirement.
出处
《计算机工程与应用》
CSCD
北大核心
2005年第4期131-132,共2页
Computer Engineering and Applications
基金
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关键词
数字签名
代理签名
假冒攻击
digital signature,proxy signature,forgery attack
