电子证据与反拒认协议

反拒认是在计算机上实现电子贸易的重要前提之一。电子证据则是反拒认技术的基础。本文讨论了电子证据的种类。构成成分及其有效性。在此基础上，提出了一种公平的反拒认协议，同时解决了收方和发方的拒认问题。它基于条件证据和反拒认服务器两个简单思想，既高效又实用。

Electronic evidence and non-repudiation protocol

Non-repudiation is one of the most important premises to achieve elec t ronic trade on computer networks,which is based on electronic evidence This pa pe r discusses types of non-repudiation evidence,elements of non-repudiation evi d ence and validity of non-repudiation evidence We propose a fair non-repudiati o n protocol to solve repudiation problem both in sender side and in receiver side By using two simple ideas,a conditional signature and a non-repudiation serv er ,our protocol can achieve non-repudiation service in an efficient and practica l manner