A Practical and Provably Secure Coalition-Resistant Group Signature Scheme

  • Giuseppe Ateniese
  • Jan Camenisch
  • Marc Joye
  • Gene Tsudik
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1880)

Abstract

A group signature scheme allows a group member to sign messages anonymously on behalf of the group. However, in the case of a dispute, the identity of a signature’s originator can be revealed (only) by a designated entity. The interactive counterparts of group signatures are identity escrow schemes or group identification scheme with revocable anonymity. This work introduces a new provably secure group signature and a companion identity escrow scheme that are significantly more efficient than the state of the art. In its interactive, identity escrow form, our scheme is proven secure and coalition-resistant under the strong RSA and the decisional Diffie-Hellman assumptions. The security of the non-interactive variant, i.e., the group signature scheme, relies additionally on the Fiat-Shamir heuristic (also known as the random oracle model).

Keywords

Group signature schemes revocable anonymity coalition-resistance strong RSA assumption identity escrow provable security 

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Giuseppe Ateniese
    • 1
  • Jan Camenisch
    • 2
  • Marc Joye
    • 3
  • Gene Tsudik
    • 4
  1. 1.Department of Computer ScienceThe Johns Hopkins UniversityBaltimoreUSA
  2. 2.IBM Research, Zurich Research LaboratoryRüschlikonSwitzerland
  3. 3.Card Security GroupGemplus Card InternationalGémenosFrance
  4. 4.Department of Information and Computer ScienceUniversity of CaliforniaIrvine, IrvineUSA

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