A fair non-repudiation protocol

Non-repudiation and fairness are two important issues in the implementation of electronic commerce. This paper discusses non-repudiation services and fair non-repudiation protocols. After analyzing two widely used fair non-repudiation protocols the fair non-repudiation protocol and the certified mail protocol, we propose a new fair non-repudiation protocol, which transports less data, has better confidentiality of message and better fairness. We analyze it with accountability framework on its non-repudiation and fairness.