Cryptology ePrint Archive: Report 2007/128

Computationally Sound Mechanized Proofs of Correspondence Assertions

Bruno Blanchet

Abstract: We present a new mechanized prover for showing correspondence assertions for cryptographic protocols in the computational model. Correspondence assertions are useful in particular for establishing authentication. Our technique produces proofs by sequences of games, as standard in cryptography. These proofs are valid for a number of sessions polynomial in the security parameter, in the presence of an active adversary. Our technique can handle a wide variety of cryptographic primitives, including shared- and public-key encryption, signatures, message authentication codes, and hash functions. It has been implemented in the tool CryptoVerif and successfully tested on examples from the literature.

Category / Keywords: cryptographic protocols / cryptographic protocols, automatic verification, computationally sound, correspondence assertions, authentication

Publication Info: The conference version of this paper is to appear at CSF'07 (IEEE Computer Security Foundations Symposium)

Date: received 4 Apr 2007

Contact author: blanchet at di ens fr

Available formats: Postscript (PS) | Compressed Postscript (PS.GZ) | PDF | BibTeX Citation

Note: This is the full version of the paper. Compared to the conference version, this version adds appendices, which contain details on the semantics of the calculus, the proof engine we use for reasoning on games, the proofs of our results, and our experiments.

Version: 20070404:095542 (All versions of this report)

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