【作者】 杜小珍；

【导师】 寇卫东；

【作者基本信息】 西安电子科技大学 ， 通信与信息系统， 2006， 硕士

【摘要】 本文对代理签名及其在电子商务中的应用做了研究。首先简介了数字签名,代理签名以及电子商务安全;其次介绍了一些常用的普通数字签名体制,并对其安全性进行了研究;接着系统介绍了代理签名体制,引入代理签名概念、分类及需要满足的安全性质,并深入研究了一些典型的代理签名方案,分析它们具有的安全性质;最后研究了代理签名在电子商务中的应用。本论文的主要研究成果有:1.根据代理签名所应该满足的不可伪造性,可识别性,防止滥用等性质,对K.Zhang代理签名方案,指定接收者的代理签名方案,以及代理签名人隐私保护的强代理签名方案提出了一些攻击方法,并给出了相应的改进方案,使其能够防止原始签名人伪造代理签名的攻击,在原方案基础上提高了签名安全性和实用性;2.提出了基于代理签名的安全电子支付协议及其安全性分析,从而使得用户可以找代理人为其在网上寻找和购买一些特殊的商品或服务。更多还原

【Abstract】 This thesis mainly discusses proxy signature and its applications in e-commerce. Firstly, we introduce digital signature, proxy signature, and e-commerce security simply. Next, we introduce some common digital signature schemes which are the base of proxy signature. And the security properties of them are discussed. Then, we introduce proxy signature systematically, including the notion and class of proxy signature as well as its security properties. Some typical proxy signature schemes are studied deeply. And their security properties are analyzed. Lastly, we study the applications of proxy signature in e-commerce. Then main results of this thesis are as follows:1). Based on the security properties, such as strong unforgeability, strong identifiability and prevention of misuse, which are needed by proxy signature, we present some terrible attacks on K.Zhang’s proxy signature, designated-receiver proxy signature scheme and Shum and Wei’s proxy signature scheme with proxy signer privacy protection, improved schemes on these schemes are proposed. The improved schemes can resist the serious attacks which we have discovered. The new schemes keep the merits of the original schemes, with the improved security and practicability.2). A secure e-payment protocol based on proxy signature is proposed. From this protocol, customers can make proxy search and buy special products or services on behalf of them.更多还原