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Journal of Applied Mathematics
Volume 2014, Article ID 138370, 10 pages
http://dx.doi.org/10.1155/2014/138370
Research Article

Formal Modeling and Analysis of Fairness Characterization of E-Commerce Protocols

School of Computer Science and Technology, Tianjin University, Tianjin 300072, China

Received 24 January 2014; Revised 4 May 2014; Accepted 4 May 2014; Published 1 June 2014

Academic Editor: Xiaoyu Song

Copyright © 2014 Chengwei Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In the past, fairness verification of exchanges between the traders in E-commerce was based on a common assumption, so-called nonrepudiation property, which says that if the parties involved can deny that they have received or sent some information, then the exchanging protocol is unfair. So, the nonrepudiation property is not a sufficient condition. In this paper, we formulate a new notion of fairness verification based on the strand space model and propose a method for fairness verification, which can potentially determine whether evidences have been forged in transactions. We first present an innovative formal approach not to depend on nonrepudiation, and then establish a relative trader model and extend the strand space model in accordance with traders’ behaviors of E-commerce. We present a case study to demonstrate the effectiveness of our verification method.