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2003
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Constructing fair-exchange protocols for E-commerce via distributed computation of RSA signatures

9 years 9 months ago
Constructing fair-exchange protocols for E-commerce via distributed computation of RSA signatures
Applications such as e-commerce payment protocols, electronic contract signing, and certified e-mail delivery require that fair exchange be assured. A fair-exchange protocol allows two parties to exchange items in a fair way so that either each party gets the other’s item, or neither party does. We describe a novel method of constructing very efficient fair-exchange protocols by distributing the computation of RSA signatures. Specifically, we employ multisignatures based on the RSA-signature scheme. To date, the vast majority of fair-exchange protocols require the use of zero-knowledge proofs, which is the most computationally intensive part of the exchange protocol. Using the intrinsic features of our multisignature model, we construct protocols that require no zero-knowledge proofs in the exchange protocol. Use of zero-knowledge proofs is needed only in the protocol setup phase—this is a one-time cost. Furthermore, our scheme uses multisignatures that are compatible with the ...
Jung Min Park, Edwin K. P. Chong, Howard Jay Siege
Added 05 Jul 2010
Updated 05 Jul 2010
Type Conference
Year 2003
Where PODC
Authors Jung Min Park, Edwin K. P. Chong, Howard Jay Siegel
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