基于离散对数的有向签名方案及其应用  

Directed signature scheme based on discrete logarithms and its application

作　　者：张彰[1] 王培春[2] 肖国镇[1] 

机构地区：[1]西安电子科技大学综合业务网国家重点实验室,陕西西安710071 [2]西南通信研究所国防科技保密通信重点实验室,四川成都610041

出　　处：《西安电子科技大学学报》2002年第4期510-512,526,共4页Journal of Xidian University

基　　金：国家自然科学基金资助项目 (60 0 73 0 5 1) ;国家重点基础研究发展规划项目 (97 3项目 ) (G19990 3 5 80 4)

摘　　要：有向签名方案要求签名的验证必须得到接收者或签名者的合作 .其目的是为了保护接收者的隐私 .文中提出一个基于离散对数的有向签名方案 ,该方案中伪造签名的困难性等价于伪造ElGamal签名 .Directed signature schemes, introduced by Lim and Lee, have the property that the signature can be verified only with the help of the signature receiver or of the signer. Such signature schemes are intended to protect the privacy of the signature receiver in applications where the signed message contains information personally sensitive to the receiver. In this paper, a directed signature scheme based on discrete logarithms is presented. Forging signatures in the proposed scheme is equivalent to forging ElGamal signatures. Finally, based on the proposed directed signature scheme, a fair exchenage protocol with an off line semi trusted third party is proposed.

关 键 词：有向签名 离散对称 零知识证明 公平交换协议 签名者 数字签名 

分 类 号：TN918.1[电子电信—通信与信息系统] TP391.4[电子电信—信息与通信工程]