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Certificateless Signature Scheme without Random Oracles

  • Yumin Yuan
  • Da Li
  • Liwen Tian
  • Haishan Zhu
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5576)

Abstract

The only known construction of certificateless signature sche-mes that can be proven secure against a malicious Key Generation Center (KGC) requires the random oracle model to prove the security. In this paper, we present a certificateless signa ure scheme which is secure against malicious-but-passive KGC attack without random oracle. The security of our scheme based on our proposed complexity assumptions we call the Augmented Computational Diffie-Hellman (ACDH) assumption and 2-Many Diffie-Hellman (2-Many-DH) assumption. At the same time, we discuss the relationship between the new assumptions and some related problems.

Keywords

Certificateless signatures Random oracle Malicious KGC attack 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Yumin Yuan
    • 1
  • Da Li
    • 1
  • Liwen Tian
    • 1
  • Haishan Zhu
    • 1
  1. 1.Dept.of Mathematics and PhysicsXiamen University of TechnologyP.R. China

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