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Efficient Partially Blind Signatures with Provable Security

  • Qianhong Wu
  • Willy Susilo
  • Yi Mu
  • Fanguo Zhang
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3982)

Abstract

Blind signatures play a central role in applications such as e-cash and e-voting systems. The notion of partially blind signature is a more applicable variant such that the part of the message contains some common information pre-agreed by the signer and the signature requester in an unblinded form. In this paper, we propose two efficient partially blind signatures with provable security in the random oracle model. The former is based on witness indistinguishable (WI) signatures. Compared with the state-of-the-art construction due to Abe and Fujisaki [1], our scheme is 25% more efficient while enjoys the same level of security. The latter is a partially blind Schnorr signature without relying on witness indistinguishability. It enjoys the same level of security and efficiency as the underlying blind signature.

Keywords

Blind Signature Common Information Discrete Logarithm Problem Valid Signature Random Oracle Model 
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 2006

Authors and Affiliations

  • Qianhong Wu
    • 1
  • Willy Susilo
    • 1
  • Yi Mu
    • 1
  • Fanguo Zhang
    • 2
  1. 1.School of Information Technology and Computer ScienceUniversity of WollongongWollongongAustralia
  2. 2.School of Information Science and TechnologySun Yat-sen UniversityGuangzhouP.R. China

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