Soundness in the Public-Key Model

  • Authors:
  • Silvio Micali;Leonid Reyzin

  • Affiliations:
  • -;-

  • Venue:
  • CRYPTO '01 Proceedings of the 21st Annual International Cryptology Conference on Advances in Cryptology
  • Year:
  • 2001

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Abstract

The public-key model for interactive proofs has proved to be quite effective in improving protocol efficiency [CGGM00]. We argue, however, that its soundness notion is more subtle and complex than in the classical model, and that it should be better understood to avoid designing erroneous protocols. Specifically, for the public-key model, we - identify four meaningful notions of soundness; - prove that, under minimal complexity assumptions, these four notions are distinct; - identify the exact soundness notions satisfied by prior interactive protocols; and - identify the round complexity of some of the new notions.