Invariant Signatures and Non-Interactive Zero-Knowledge Proofs are Equivalent (Extended Abstract)

  • Authors:
  • Shafi Goldwasser;Rafail Ostrovsky

  • Affiliations:
  • -;-

  • Venue:
  • CRYPTO '92 Proceedings of the 12th Annual International Cryptology Conference on Advances in Cryptology
  • Year:
  • 1992

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Abstract

The standard definition of digital signatures allows a document to have many valid signatures. In this paper, we consider a subclass of digital signatures, called invariant signatures, in which all legal signatures of a document must be identical according to some polynomial-time computable function (of a signature) which is hard to predict given an unsigned document. We formalize this notion and show its equivalence to non-interactive zero-knowledge proofs.