Publication Type

Journal Article

Version

publishedVersion

Publication Date

1-2012

Abstract

Optimistic fair exchange (OFE) is a kind of protocols to solve the problem of fair exchange between two parties. Most of the previous work on this topic are provably secure in the random oracle model. In this work, we propose a new construction of OFE from another cryptographic primitive, called time capsule signature. The construction is efficient and brings almost no overhead other than the primitive itself. The security of our new construction is based on that of the underlying primitive without relying on the random oracle heuristic. Applying our generic construction to the time capsule signature scheme recently proposed by Libert and Quisquater, we obtain a new concrete and efficient OFE construction secure based on Computational Diffie–Hellman assumption in the standard model

Keywords

CDH assumption, Optimistic fair exchange, Standard model, Time capsule signature

Discipline

Information Security

Research Areas

Information Systems and Management

Publication

International Journal of Information Security

Volume

11

Issue

1

First Page

53

Last Page

63

ISSN

1615-5262

Identifier

10.1007/s10207-011-0152-3

Publisher

Springer Verlag (Germany)

Additional URL

http://doi.org/10.1007/s10207-011-0152-3

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