摘要
该论文对ElGamal数字签名系统的各类攻击方法进行系统分析和研究,将目前的攻击方法分为整体性攻击,求签名者的密钥;任意性攻击,对任意消息伪造有效签名;构造特殊的参数,对某些特殊的消息求出其有效签名。该文通过对ElGamal数字签名系统的安全性分析,提出了建立ElGa-mal签名系统应用实例时需要遵循的参数选择原则和选择方法。
In this paper,various attack methods to ElGamal are analyzed and studied.Based on the studies,three kinds of attack methods are summarized: wholly attack,by which signer's keys are ciphered out;arbitrary attack,by which valid signature are forged for arbitary messages;by constructing special parameter,some valid signature are forged for special messages.According to the safety analysis of ElGamal digital signature system,fundamentals and methods for selecting parameters are summed up in establishing instances of ElGamal signature system.
出处
《杭州电子科技大学学报（自然科学版）》
2007年第3期41-43,共3页
Journal of Hangzhou Dianzi University：Natural Sciences
关键词
数字签名
安全性
参数选择
digital signature
safety
selecting parameters
