Efficient Identity-Based Signatures Secure in the Standard Model

  • Kenneth G. Paterson
  • Jacob C. N. Schuldt
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4058)


The only known construction of identity-based signatures that can be proven secure in the standard model is based on the approach of attaching certificates to non-identity-based signatures. This folklore construction method leads to schemes that are somewhat inefficient and leaves open the problem of finding more efficient direct constructions. We present the first such construction. Our scheme is obtained from a modification of Waters’ recently proposed identity-based encryption scheme. It is computationally efficient and the signatures are short. The scheme’s security is proven in the standard model and rests on the hardness of the computational Diffie-Hellman problem in groups equipped with a pairing.


Signature Scheme Random Oracle Discrete Logarithm Problem Random Oracle Model Public Parameter 
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

  • Kenneth G. Paterson
    • 1
  • Jacob C. N. Schuldt
    • 1
  1. 1.Information Security Group, Royal HollowayUniversity of LondonEghamUK

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