Non-interactive and re-usable universally composable string commitments with adaptive security

  • Authors:
  • Marc Fischlin;Benoît Libert;Mark Manulis

  • Affiliations:
  • TU Darmstadt & CASED, Germany;ICTEAM Institute, Université catholique de Louvain, Belgium;TU Darmstadt & CASED, Germany

  • Venue:
  • ASIACRYPT'11 Proceedings of the 17th international conference on The Theory and Application of Cryptology and Information Security
  • Year:
  • 2011

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Abstract

We present the first provably secure constructions of universally composable (UC) commitments (in pairing-friendly groups) that simultaneously combine the key properties of being non-interactive, supporting commitments to strings (instead of bits only), and offering re-usability of the common reference string for multiple commitments. Our schemes are also adaptively secure assuming reliable erasures.