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Authenticated Key Exchange in Tamarin

This repo contains some models of authenticated key exchange protocols in the Tamarin prover syntax.

  • The BADH protocol from the SIGMA paper, in order to verify that Tamarin finds some known attacks on AKEs. Identity misbinding attacks are manifested as liveness attacks.
  • SIGMA itself (without identity protection)
  • The Katz-Yung group AKE compiler, specialized to a vanilla two-party DH exchange.
  • A simplified Katz-Yung variant where the DH keys are used as entropy instead of dedicated random values.
  • An "incremental" Katz-Yung variant that can be done asynchronously, and starts to look like an initkey dance...

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Models for authenticated key exchange in Tamarin

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