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On Fair E-cash Systems Based on Group Signature Schemes

  • Sébastien Canard
  • Jacques Traoré
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2727)

Abstract

A fair electronic cash system is a system that allows customers to make payments anonymously. Moreover, under certain circumstances, a trusted authority can revoke the anonymity of suspicious transactions. Various fair e-cash systems using group signature schemes have been proposed [4,15,16,18]. Unfortunately, they do not realize coin tracing [4,15,18] (the possibility to trace the coins withdrawn by a customer). In this paper, we describe several failures in the solution of [16] and we present a secure and efficient fair e-cash system based on a group signature scheme. Our system ensures traceability of double-spenders, supports coin tracing and provides coins that are unforgeable and anonymous under standard assumptions.

Keywords

Signature Scheme Blind Signature Random Oracle Model Blind Signature Scheme Group Signature Scheme 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Sébastien Canard
    • 1
  • Jacques Traoré
    • 1
  1. 1.France Telecom R&DCaen CedexFrance

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