Universally composable incoercibility

  • Authors:
  • Dominique Unruh;Jörn Müller-Quade

  • Affiliations:
  • Saarland University;Karlsruhe Institute of Technology

  • Venue:
  • CRYPTO'10 Proceedings of the 30th annual conference on Advances in cryptology
  • Year:
  • 2010

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Abstract

We present the UC/c framework, a general definition for secure and incoercible multi-party protocols. Our framework allows to model arbitrary reactive protocol tasks (by specifying an ideal functionality) and comes with a universal composition theorem. We show that given natural setup assumptions, we can construct incoercible two-party protocols realising arbitrary functionalities (with respect to static adversaries).