An Electronic Contract Signing Protocol Using Fingerprint Biometrics

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Author(s): Harkeerat Bedi (University of Tennessee at Chattanooga, USA), Li Yang (University of Tennessee at Chattanooga, USA)and Joseph M. Kizza (University of Tennessee at Chattanooga, USA)
Copyright: 2011
Pages: 28
Source title: Applied Cryptography for Cyber Security and Defense: Information Encryption and Cyphering
Source Author(s)/Editor(s): Hamid R. Nemati (The University of North Carolina at Greensboro, USA)and Li Yang (University of Tennessee, USA)
DOI: 10.4018/978-1-61520-783-1.ch009

Keywords: Information Science Reference / Information Security & Privacy / IT Security and Ethics / Security & Forensics

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Abstract

Fair exchange between a pair of parties can be defined as the fundamental concept of trade where none of the parties involved in the exchange have an unfair advantage over the other once the transaction completes. Fair exchange protocols are a group of protocols that provide means for accomplishing such fair exchanges. In this chapter we analyze one such protocol which offers means for fair contract signing, where two parties exchange their commitments over a pre-negotiated contract. We show that this protocol is not entirely fair and illustrate the possibilities of one party cheating by obtaining the other’s commitment and not providing theirs. We also analyze a revised version of this protocol which offers better fairness by handling many of the weaknesses. Both these protocols however fail to handle the possibilities of replay attacks where an intruder replays messages sent earlier from one party to the other. Our proposed protocol improves upon these protocols by addressing to the weaknesses which leads to such replay attacks. We implement a complete working system which provides fair contract signing along with properties like user authentication and efficient password management achieved by using a fingerprint based authentication system and features like confidentiality, data-integrity and non-repudiation accomplished through implementation of cryptographic algorithms based on elliptic curves.

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An Electronic Contract Signing Protocol Using Fingerprint Biometrics

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