摘要
分析了一个基于证书认证机制的公平交换协议,指出该协议在设计时,存在密码算法操作上错误,并且协议中存在冗余的验证和消息,从而使该协议不具有简单、快速和优化的效果.本文提出了一个基于RSA的改进方案,改进的方案要比原方案节省了8次指数运算和一轮消息交换.
Fair exchange is the basis of security in electronic commerce. This paper first analyzed a fair exchange protocol based on certificate authentication mechanism. We showed that there was an operational error of cryptographic algorithm when devising this protocol. Indeed, it was inefficient as there were redundant verifications and messages in the course of its execution. Next, we improved the scheme by introducing an efficient and simple fair exchange protocol based on RSA. The proposed scheme saved 8 exponentiations and one round of message exchange, compared with the previous scheme.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第1期114-116,共3页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金重大课题资助项目(60273049
90104005)
关键词
电子商务
公平交换
安全分析
electronic commerce
fair exchange
security analysis
