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A digital multisignature scheme based on the Fiat-Shamir scheme

  • Kazuo Ohta
  • Tatsuaki Okamoto
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 739)

Abstract

We show the sequential multisignature scheme based on the Fiat-Shamir scheme which is a slight variant of simultaneous multisignature scheme, and discuss the security of a digital multisignature scheme. The following properties are proven;
  1. (1)

    The difficulty of deriving secret information from public information in a multisignature scheme with already used signatures is equivalent to that of deriving it in a single signature scheme; and

     
  2. (2)

    The difficulty of forging a partial multisignature so that the total multisignature is valid is equivalent to that of deriving a single signature in the Fiat-Shamir scheme.

     

Keywords

Smart Card Signature Scheme Polynomial Time Algorithm Security Level Identification Information 
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 1993

Authors and Affiliations

  • Kazuo Ohta
    • 1
  • Tatsuaki Okamoto
    • 1
  1. 1.NTT LaboratoriesNippon Telegraph and Telephone CorporationKanagawa-kenJapan

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