Identity-Based Threshold Signature Scheme from the Bilinear Pairings

  • Authors:
  • Joonsang Baek;Yuliang Zheng

  • Affiliations:
  • -;-

  • Venue:
  • ITCC '04 Proceedings of the International Conference on Information Technology: Coding and Computing (ITCC'04) Volume 2 - Volume 2
  • Year:
  • 2004

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Abstract

The focus of this paper is to formalize the concept ofidentity-based threshold signature and give the firstprovably secure scheme based on the bilinear pairings.An important feature of our scheme is that a privatekey associated with an identity rather than a masterkey of the Public Key Generator is shared amongsignature generation servers, which is more desirablein practice. Another interesting aspect of our results isthat the security of one of the verifiable secret sharingschemes used to construct the identity-based thresholdsignature scheme is relative to a slightly modifiedversion of the Generalized Tate Inversion problemrecently proposed by Joux.