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On Possibility of Universally Composable Commitments Based on Noisy Channels

Rafael DowsleyJörn Müller-QuadeAnderson C. A. Nascimento

Universally Composable (UC) Commitment is a strong notion that guarantees security even when the commitment protocol is composed with arbitrary protocols running many of their copies in parallel. It is impossible to implement a protocol that realizes UC Commitment without set-up assumptions. However, it has been implemented using such assumptions as common reference string, certified public keys and random oracles. In this paper we prove that the existence of a binary symmetric channel between the parties makes possible the accomplishment of UC Commitment.

http://www.lbd.dcc.ufmg.br/colecoes/sbseg/2008/008.pdf

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