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Coercion-freeness in e-voting via multi-party designated verifier schemes

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2012

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Gesellschaft für Informatik e.V.

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In this paper we present how multi-party designated verifier signatures can be used as generic solution to provide coercion-freeness in electronic voting schemes. We illustrate the concept of multi-party designated verifier signatures with an enhanced version of Ghodosi and Pieprzyk [GP06]'s threshold signature scheme. The proposed scheme is efficient, secure, allows distributed computations of the signature on the ballot receipt, and can be parameterized to set a threshold on the number of required signers. The security of the designated verifier property is evaluated using the simulation paradigm [Gol00] based on the security analysis of [GHKR08]. Unlike previously provable schemes, ours is ideal, i.e. the bit-length of each secret key share is bounded by the bit-length of the RSA modulus.

Beschreibung

Dossogne, Jérôme; Lafitte, Frédéric; Markowitch, Olivier (2012): Coercion-freeness in e-voting via multi-party designated verifier schemes. 5th International Conference on Electronic Voting 2012 (EVOTE2012). Bonn: Gesellschaft für Informatik e.V.. PISSN: 1617-5468. ISBN: 978-3-88579-299-4. pp. 127-141. Regular Research Papers. Bregenz, Austria. July 11-14, 2012

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