InforLorV4, Main, Exploration, bibRecord, 001A52

Security protocols, constraint systems, and group theories

Identifieur interne : 001A52 ( Main/Exploration ); précédent : 001A51; suivant : 001A53

Security protocols, constraint systems, and group theories

Auteurs : Stéphanie Delaune [France] ; Steve Kremer [France] ; Daniel Pasaila [Canada]

Source :

RBID : Hal:hal-00729091

Abstract

When formally analyzing security protocols it is often im- portant to express properties in terms of an adversary's inability to distinguish two protocols. It has been shown that this problem amounts to deciding the equivalence of two constraint systems, i.e., whether they have the same set of solutions. In this paper we study this equivalence problem when cryptographic primitives are modeled using a group equational theory, a special case of monoidal equational theories. The results strongly rely on the isomorphism between group theories and rings. This allows us to reduce the problem under study to the problem of solving systems of equations over rings. We provide several new decidability and complexity results, notably for equational theories which have applications in security protocols, such as exclusive or and Abelian groups which may additionally admit a unary, homomorphic symbol.

Url:

https://hal.inria.fr/hal-00729091

DOI: 10.1007/978-3-642-31365-3_15

Affiliations:

Links toward previous steps (curation, corpus...)

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Le document en format XML

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<front><div type="abstract" xml:lang="en">When formally analyzing security protocols it is often im- portant to express properties in terms of an adversary's inability to distinguish two protocols. It has been shown that this problem amounts to deciding the equivalence of two constraint systems, i.e., whether they have the same set of solutions. In this paper we study this equivalence problem when cryptographic primitives are modeled using a group equational theory, a special case of monoidal equational theories. The results strongly rely on the isomorphism between group theories and rings. This allows us to reduce the problem under study to the problem of solving systems of equations over rings. We provide several new decidability and complexity results, notably for equational theories which have applications in security protocols, such as exclusive or and Abelian groups which may additionally admit a unary, homomorphic symbol.</div>
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Security protocols, constraint systems, and group theories

Security protocols, constraint systems, and group theories

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