Cryptology ePrint Archive: Report 2007/353

Multiparty Computation to Generate Secret Permutations

Chris Studholme and Ian Blake

Abstract: We make use of a universal re-encryption mixnet to efficiently perform a secure multiparty computation to generate a secret permutation. When complete, the permutation is shared among the players in such a way that each player knows his share of the permutation but no others. Such a permutation is useful in dining cryptographers networks (DC-nets) to determine in which slot each player should transmit. We also see this primitive as being useful in online gaming for either shuffling cards or ordering players without the need for a trusted dealer or other third party.

Category / Keywords: cryptographic protocols / secure multiparty computation, secret permutation, re-encryption, ElGamal encryption

Date: received 6 Sep 2007

Contact author: cvs at cs utoronto ca

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Version: 20070913:193338 (All versions of this report)

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