Deciding the Security of Protocols with Commuting Public Key Encryption.
Identifieur interne : 006626 ( Main/Exploration ); précédent : 006625; suivant : 006627Deciding the Security of Protocols with Commuting Public Key Encryption.
Auteurs : Yannick Chevalier [France] ; Ralf Küsters ; Michaël Rusinowitch [France] ; Mathieu Turuani [France]Source :
English descriptors
Abstract
We show that deciding insecurity of cryptographic protocols for finite sessions and commuting publi keys is in NP. Many cryptographic protocols and attacks on these protocols make use of the fact that the order in which encryption is performed does not affect the result of the encryption, i.e. encryption is commutative. However, most models for the automatic analysis of cryptographic protocols can not handle such encryption functions since in these models the message space is considered a free term algebra. In this paper, we present an NP decision procedure for the insecurity of protocols that employ RSA encryption, which is one of the most important instances of commuting public key encryption.
Url:
Affiliations:
- France
- Franche-Comté, Grand Est, Lorraine (région)
- Belfort, Besançon, Nancy
- Institut national polytechnique de Lorraine, Université Nancy 2, Université de Bourgogne Franche-Comté, Université de Franche-Comté, Université de Lorraine, Université de technologie de Belfort-Montbéliard
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Le document en format XML
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<front><div type="abstract" xml:lang="en">We show that deciding insecurity of cryptographic protocols for finite sessions and commuting publi keys is in NP. Many cryptographic protocols and attacks on these protocols make use of the fact that the order in which encryption is performed does not affect the result of the encryption, i.e. encryption is commutative. However, most models for the automatic analysis of cryptographic protocols can not handle such encryption functions since in these models the message space is considered a free term algebra. In this paper, we present an NP decision procedure for the insecurity of protocols that employ RSA encryption, which is one of the most important instances of commuting public key encryption.</div>
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