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Efficient Optimistic N-Party Contract Signing Protocol

  • Josep L. Ferrer-Gomila
  • Magadalena Payeras-Capellà
  • Llorenç Huguet-Rotger
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2200)

Abstract

Contract signing is a fundamental service in the environment of the electronic commerce. It is a kind of fair exchange of values: a signature on a text contract for another signature on the same text. We present a fair protocol that requires the existence and possible involvement of a TTP (trusted third party), but it only intervenes in case of exception (it plays a subsidiary role). The protocol is the best solution to the date in terms of efficiency. We present and analyse a two-party and three-party version of the protocol, and we outline an N-party version. Finally, it is very simple and easy to understand. If we think that at the end some conflicts will be solved in courts, it is a non worthless characteristic.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Josep L. Ferrer-Gomila
    • 1
  • Magadalena Payeras-Capellà
    • 1
  • Llorenç Huguet-Rotger
    • 1
  1. 1.Departament de Ciències Matemàtiques i InformàticaUniversitat de les Illes BalearsPalma de MallorcaSpain

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