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The Computer Journal 1999 42(7):569-581; doi:10.1093/comjnl/42.7.569
© 1999 by British Computer Society
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A Flexible Approach to Secure and Fair Document Exchange

N. ZhangA1, Q. ShiA2 and M. MerabtiA2

A1 Department of Computing & Mathematics, Manchester Metropolitan University, Manchester M1 5GD, UK Email: N.Zhang@doc.mmu.ac.uk A2 School of Computing & Mathematical Sciences, Liverpool John Moores University, Liverpool L3 3AF, UK

This paper presents a novel protocol for achieving secure and fair document exchange among multi-parties. The protocol has the following characteristics: it employs no trusted (third) party when a majority of the parties involved behave honestly; it adopts a technique for integrity and originality verification of messages without use of either asymmetric (public key) or symmetric (conventional) encryption; and it maximises the use of hash and polynomial functions. In comparison with existing protocols, this new protocol has a number of advantages such as better flexibility and reliability. The protocol is also assessed with respect to a set of requirements such as atomicity and assurance.

Received 2 October, 1998. Revised 18 August, 1999.


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