CryptoVerif
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CryptoVerif is a software tool for the automatic reasoning about security protocols written by Bruno Blanchet.
Supported cryptographic mechanisms
It provides a mechanism for specifying the security assumptions on cryptographic primitives, which can handle in particular
Concrete security
CryptoVerif claims to evaluate the probability of a successful attack against a protocol relative to the probability of breaking each cryptographic primitive, i.e. it can establish concrete security.