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Information Sciences
Volume 178, Issue 5, 1 March 2008, Pages 1418-1421
 
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doi:10.1016/j.ins.2007.10.009    How to Cite or Link Using DOI (Opens New Window)
Copyright © 2007 Elsevier Inc. All rights reserved.

An attack on a payment scheme

Alfredo De Santisa, E-mail The Corresponding Author, Anna Lisa Ferraraa, E-mail The Corresponding Author and Barbara MasucciCorresponding Author Contact Information, a, E-mail The Corresponding Author

aDipartimento di Informatica ed Applicazioni, Università di Salerno, 84084 Fisciano (SA), Italy

Received 30 March 2007; 
revised 15 October 2007; 
accepted 18 October 2007. 
Available online 30 October 2007.

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Abstract

Recently, Wang et al. have proposed an offline payment scheme providing scalable anonymity. The authors claim that their scheme can prevent a consumer from spending a coin more than once, since after a double-spending the identity of the consumer is revealed.

In this paper, we show that in Wang et al.’s scheme, given a valid coin and without knowing any secret information, everyone is able to spend the coin as many times as he wants. In particular, we show how a cheater, using only public information, can construct a faked proof of ownership of the coin without running any risk of being discovered.

Keywords: Electronic-cash; Double-spending; Anonymity

Article Outline

1. Introduction
2. Overview of Wang et al.’s scheme
3. An attack on Wang et al.’s scheme
4. Conclusions
References




Information Sciences
Volume 178, Issue 5, 1 March 2008, Pages 1418-1421
 
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