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Constant-Size ID-Based Linkable and Revocable-iff-Linked Ring Signature

  • Man Ho Au
  • Joseph K. Liu
  • Willy Susilo
  • Tsz Hon Yuen
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4329)

Abstract

In this paper, we propose a new notion called Revocable-iff-Linked Ring Signature (R-iff-L Ring Signature). In R-iff-L ring signatures, a signer can sign on behalf of the whole group, just like ordinary ring signatures. However, if he signs twice or more, he can be linked and his identity can be revoked by everyone. We formally define a new security model for the new notion in identity-based (ID-based) setting and propose a constant-size ID-based construction, that is, the size of the signature is independent of the size of the group. In addition, we enhance the security model of ID-based linkable ring signature scheme and provide an implementation with constant size setting. Both schemes are provably secure in our new model.

Keywords

Anonymity Linkable Revocable Ring Signature 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Man Ho Au
    • 1
  • Joseph K. Liu
    • 2
  • Willy Susilo
    • 1
  • Tsz Hon Yuen
    • 3
  1. 1.Centre for Information Security Research, School of Information Technology and Computer ScienceUniversity of WollongongWollongongAustralia
  2. 2.Department of Computer ScienceUniversity of BristolBristolUK
  3. 3.Department of Information EngineeringThe Chinese University of Hong KongShatinHong Kong

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