摘要
基于代理签名理论和前向安全签名理论,提出了一个前向安全的强代理签名方案,其安全性建立在求离散对数和模合数求平方根是困难的这两个假设的基础上。此方案同时对代理签名人和原始签名人的权益提供了保护,攻击者即使在第i时段入侵系统,也无法伪造第i时段之前的签名,因而具有较高执行效率和较强的安全性。
A forward secure strong proxy signature scheme is proposed on the basis of the proxy signature schemes and forward secure schemes.The security of the proposed scheme relies on the difficulty of solving discrete logarithm problems and the difficulty of computing square roots modulo a large composite number.The signature scheme provides the safeguard to the rights and interests of both the original and the proxy signers.Even if an adversary can intrude the system and obtain the signature key at time period i, it could not forge the proxy signature before time period i.
出处
《信息与电子工程》
2003年第4期257-259,共3页
information and electronic engineering
基金
National Grand Fundamental Research 973 Program of China(1998030600)
关键词
公钥密码学
数字签名
前向安全
离散对数
模合数求平方根
代理签名
public key cryptology
digital signature
forward security
discrete logarithm
square root modulo composites
