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Article type: Research Article
Authors: Cadé, David; * | Blanchet, Bruno
Affiliations: INRIA Paris-Rocquencourt, Paris, France. E-mails: david.cade@normalesup.org, bruno.blanchet@inria.fr
Correspondence: [*] Corresponding author: David Cadé, INRIA Paris-Rocquencourt, 23 Avenue d’Italie, 75013 Paris, France. E-mail: david.cade@normalesup.org.
Abstract: In order to obtain implementations of security protocols proved secure in the computational model, we previously proposed the following approach: we write a specification of the protocol in the input language of the computational protocol verifier CryptoVerif, prove it secure using CryptoVerif, then generate an OCaml implementation of the protocol from the CryptoVerif specification using a specific compiler that we have implemented. However, until now, this compiler was not proved correct, so we did not have real guarantees on the generated implementation. In this paper, we fill this gap. We prove that this compiler preserves the security properties proved by CryptoVerif: if an adversary has probability p of breaking a security property in the generated code, then there exists an adversary that breaks the property with the same probability p in the CryptoVerif specification. Therefore, if the protocol specification is proved secure in the computational model by CryptoVerif, then the generated implementation is also secure.
Keywords: Cryptographic protocol, computational model, implementation, compiler, CryptoVerif, OCaml, verification
DOI: 10.3233/JCS-150524
Journal: Journal of Computer Security, vol. 23, no. 3, pp. 331-402, 2015
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