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Computer Engineering and Applications Journal

Fair exchange protocol with off-line semi-trusted third party

Zhou Xuan-wu

Published Jan 1, 2009• 0 citations
OpenAlex

Abstract

As the core of electronic commerce,fair exchange protocol is a main trend in nowadays research.Based on classic protocol of Jianying Zhou's,this paper proposes a new concise and highly efficient fair exchange protocol.It uses Hash function and two signatures to ensure the commutative message true and safe.When dissension is happened,Trusted Third Party only need to publish H(K).Compared with Jianying Zhou's,this new protocol is more efficient.

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As the core of electronic commerce,fair exchange protocol is a main trend in nowadays research.Based on classic protocol of Jianying Zhou's,this paper proposes a new concise and highly efficient fair exchange protocol.It uses Hash function and two signatures to ensure the commutative message true and safe.When dissension is happened,Trusted Third Party only need to publish H(K).Compared with Jianying Zhou's,this new protocol is more efficient.
Fair multi-party exchange protocol is one of the foundation electronic commerce, but at present, the study of multi-party fair exchange protocol is very weak. Aiming at solving this problem, we present a secure and efficient ID-based fair multi-party exchange protocol with off-line semi-trusted third party. Application of multi-receiver identity-based encryption and PVSS scheme ensure security and efficiency of this new protocol. And it applied to multi-party certified e-mail exchange in network environment.
Based on a short signature scheme and discrete logarithm problem,a new fair exchange protocol with the off-line semi-Trusted Third Party(TTP) is proposed.The off-line semi-TTP intervenes into the protocol in case of trouble,which makes the fair exchange optimistic.The off-line TTP need not be completely trusted,since it can get neither signature exchanged when disputation is solved.Because this protocol is based on short signature,which needs low storage and little communication,it can be used in low-bandwidth communication and low-storage environments.