【摘要】 文章提出了一种公平的依赖可信第三方的反拒认协议，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思想，既高效又实用。更多还原

【Abstract】 This paper proposes a fair non-repudiation protocol to solve repudiation problem both in sender side and in receiver side, which is based on trusted third party. By using two simple ideas, a conditional signature and a nonrepudiation server, our protocol can achieve non-repudiation service in an efficient and practical manner.更多还原