CCS2025

Subversion-resilient Key-exchange in the Post-quantum World

Kévin Duverger, Pierre-Alain Fouque, Charlie Jacomme, Guilhem Niot, Cristina Onete

Abstract

Subversion-resilient Authenticated key-exchange (AKE) aims to achieve the guarantees of secure AKE even in the presence of an adversary that has tampered with parts of the protocol's implementation. One way to achieve subversion-resilient AKE is the use of Reverse Firewalls (RFs), an untrusted third-party that can restore security. Recent work[17] highlights the challenges of designing RFs for practical secure channel-establishment.