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Recoverable and Untraceable E-Cash

  • Joseph K. Liu
  • Patrick P. Tsang
  • Duncan S. Wong
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3545)

Abstract

In an electronic cash (e-cash) system, Recoverability means once you have lost your e-cash, you still can get back the amount of e-cash that you have lost. Untraceability means no one can trace where and when you have spent your e-cash. Obviously these are conflicting properties in an e-cash system. Most of the e-cash systems proposed in the literature do not include recoverability. Although some of them such as [17] contain recoverability, it is an on-line e-cash system. In this paper, we propose a new efficient e-cash protocol which possesses these two properties simultaneously. At the same time, it still remains off-line.

Keywords

E-Cash Recoverable Untraceable 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Joseph K. Liu
    • 1
  • Patrick P. Tsang
    • 1
  • Duncan S. Wong
    • 2
  1. 1.Department of Information EngineeringThe Chinese University of Hong KongShatin, Hong Kong
  2. 2.Department of Computer ScienceThe City University of Hong KongHong Kong

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