An efficient protocol for anonymous and fair document exchange

Authors:
N. Zhang;Q. Shi;M. Merabti
Affiliations:
Department of Computer Science, The University of Manchester, Oxford Road, Manchester M13 9PL, UK;School of Computing & Mathematical Sciences, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK;School of Computing & Mathematical Sciences, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK
Venue:
Computer Networks: The International Journal of Computer and Telecommunications Networking
Year:
2003

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Abstract

Fairness in document exchange has been well studied, while anonymity in the exchange, which protects the privacy of personal information such as identities and locations, has been either ignored or handled with partial or inappropriate considerations. In this paper we propose a new protocol for anonymous and fair document exchange between two parties with the assistance of an off-line trusted third party. The new protocol treats both fairness and anonymity as essential properties, employs an efficient method for off-line key recovery, and places weak requirements on the security of the third party.