摘要
基于前向安全性思想和代理签名理论,提出了一种具有前向安全性的代理签名方案。该方案的安全性依赖于求有限域中离散对数的困难性,将整个签名的有效时间分为T个时间段,密钥进化算法使得不同时段的密钥不同,即使代理签名人第i个时间段的密钥泄露,此前其所产生的代理签名依然有效。
On the basis of forward-security and the theory of digital signature, a forward-secure proxy signature scheme was presented. The security of the scheme relies on difficuty of solving discrete logarithm problem in a finite range. The effective period is divided into T periods. The key of each period is different because of key evolution algorithm. Even if an adversary has gotten the current signer＇s key, previous generated proxy signature remains still valid.
出处
《青岛大学学报（自然科学版）》
CAS
2007年第2期46-49,共4页
Journal of Qingdao University(Natural Science Edition)
关键词
数字签名
代理签名
前向安全
digital signature
proxy signature
forward-security
