Simultaneously resettable arguments of knowledge

  • Authors:
  • Chongwon Cho;Rafail Ostrovsky;Alessandra Scafuro;Ivan Visconti

  • Affiliations:
  • Department of Computer Science, UCLA;Department of Computer Science, UCLA, USA and Department of Mathematics, UCLA;Dipartimento di Informatica, University of Salerno, Italy;Dipartimento di Informatica, University of Salerno, Italy

  • Venue:
  • TCC'12 Proceedings of the 9th international conference on Theory of Cryptography
  • Year:
  • 2012

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Abstract

In this work, we study simultaneously resettable arguments of knowledge. As our main result, we show a construction of a constant-round simultaneously resettable witness-indistinguishable argument of knowledge (simresWIAoK, for short) for any NP language. We also show two applications of simresWIAoK: the first constant-round simultaneously resettable zero-knowledge argument of knowledge in the Bare Public-Key Model; and the first simultaneously resettable identification scheme which follows the knowledge extraction paradigm.