[Resource Topic] 2019/444: Symmetric-key Authenticated Key Exchange (SAKE) with Perfect Forward Secrecy

Welcome to the resource topic for 2019/444

Title:
Symmetric-key Authenticated Key Exchange (SAKE) with Perfect Forward Secrecy

Authors: Gildas Avoine, Sébastien Canard, Loïc Ferreira

Abstract:

Key exchange protocols in the asymmetric-key setting are known to provide stronger security properties than protocols in symmetric-key cryptography. In particular, they can provide perfect forward secrecy, as illustrated by key exchange protocols based on the Diffie-Hellman scheme. However public-key algorithms are too heavy for low-resource devices, which can then not benefit from forward secrecy. In this paper, we describe a scheme that solves this issue. Using a nifty resynchronisation technique, we propose an authenticated key exchange protocol in the symmetric-key setting that guarantees perfect forward secrecy. We prove that the protocol is sound, and provide a formal security proof.

ePrint: https://eprint.iacr.org/2019/444

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