Complete Fairness in Multi-party Computation without an Honest Majority

  • Authors:
  • S. Dov Gordon;Jonathan Katz

  • Affiliations:
  • Dept. of Computer Science, University of Maryland,;Dept. of Computer Science, University of Maryland,

  • Venue:
  • TCC '09 Proceedings of the 6th Theory of Cryptography Conference on Theory of Cryptography
  • Year:
  • 2009

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Abstract

Gordon et al. recently showed that certain (non-trivial) functions can be computed with complete fairness in the two-party setting. Motivated by their results, we initiate a study of complete fairness in the multi-party case and demonstrate the first completely-fair protocols for non-trivial functions in this setting. We also provide evidence that achieving fairness is "harder" in the multi-party setting, at least with regard to round complexity.