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Cryptanalysis of the Wu–Varadhrajan fair exchange protocol

✍ Scribed by Olivier Markowitch; Shahrokh Saeednia

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
58 KB
Volume
87
Category
Article
ISSN
0020-0190

No coin nor oath required. For personal study only.

✦ Synopsis

In this paper we present an attack on a fair exchange protocol proposed by Wu and Varadharajan. We show that, after two executions of the protocol, a dishonest participant can collect enough information in order to obtain some secret information of the other participant. This precisely allows him to compute the final signature of the other participant in all subsequent executions of the protocol, without disclosing his own signature.

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