Fair protocols for message transfer

Abstract

Fairness is the vitally necessary for application of electronic transaction.A fair protocol is presented for message transfer in electronic commerce.The protocol is designed to assure when the protocol ends,both parties get the expected messages or nothing.The protocol,based on optimistic approach,uses convertible signature scheme and non-interactive zero-knowledge proof to achieve efficient transparent TTP.Also,the protocol generates standard GDH(gap diffie-hellman) signatures as the final non-repudiation evidences.All these efforts make the protocol efficient and easy to be fitted in existing systems.