基于公开可验证秘密分享的公平合同签署协议  

Fair Contract Signing Protocol Based on Publicly Verifiable Secret Sharing

作　　者：刘文远[1] 张爽[1] 张江霄[1] 

机构地区：[1]燕山大学信息科学与工程学院,秦皇岛066004

出　　处：《计算机科学》2009年第2期111-113,共3页Computer Science

基　　金：国家科技部高新技术计划项目(2005EJ000017);国家电子信息发展基金及河北省信息产业发展计划项目(2005035025);河北省自然科学基金(F2005000368)资助

摘　　要：通过引入n个离线半可信第三方提出一种新的公平合同签署协议。该协议利用公开可验证秘密分享(PVSS)原理,不仅实现了签名者隐私的保护,还有效地降低了签名者中的一方与离线半可信第三方合谋来获取另一方签名的概率,从而使得合同签署协议具有更好的公平性。另外,本协议还通过利用多重签名技术,使签名者最终获得同时包含双方签名的合同,这是传统纸质合同的显著特点,因此提出的协议具有一定的实用性。Through introducing n off-line semi-trusted third parties,a new fair contract signing protocol was proposed. This protocol uses publicly verifiable secret sharing（PVSS） principle not only to realize the signers＇ privacy protection, but also reduce probability that one party conspires with off-line semi-trusted third parties to gain another party＇s signature, thus causes the contract signing protocol to have a better fairness. Moreover, the protocol also through the use of multiple signature technology,causes the signers to obtain finally the contract which contains both party＇s signatures. Of course, that is the outstanding feature of traditional paper contract. Therefore, the protocol proposed in this article has certain usability.

关 键 词：SCHNORR签名 公开可验证秘密分享(PVSS) (T N)门限 合谋 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TN918[自动化与计算机技术—计算机科学与技术]