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Deciding knowledge in security protocols under some e-voting theories

Published online by Cambridge University Press:  26 August 2011

Mouhebeddine Berrima ,
Narjes Ben Rajeb  and
Véronique Cortier
Mouhebeddine Berrima
Affiliation:
LIP2, Faculté des Sciences, Tunis, Tunisia. berrima.mouheb@gmail.com
Narjes Ben Rajeb
Affiliation:
LIP2, Institut National des Sciences Appliquées et de Technologie, Tunis, Tunisia.
Véronique Cortier
Affiliation:
Loria, INRIA & CNRS, Nancy, France.
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Abstract

In the last decade, formal methods have proved their interest whenanalyzing security protocols. Security protocols require inparticular to reason about the attacker knowledge. Two standardnotions are often considered in formal approaches: deducibility andindistinguishability relations. The first notion states whether anattacker can learn the value of a secret, while the latter stateswhether an attacker can notice some difference between protocol runswith different values of the secret. Several decision procedureshave been developed so far for both notions but none of them can beapplied in the context of e-voting protocols, which requirededicated cryptographic primitives. In this work, we show that bothdeduction and indistinguishability are decidable in polynomial timefor two theories modeling the primitives of e-voting protocols.

Keywords

Security protocolsformal methodsdecidabilitye-votingequational theorydeductionstatic equivalence
Type
Research Article
Information
RAIRO - Theoretical Informatics and Applications , Volume 45 , Issue 3 , July 2011 , pp. 269 - 299
Copyright
© EDP Sciences, 2011

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