Is Eve nearby? Analysing protocols under the distant-attacker assumption

Abstract

Various modern protocols tailored to emerging wire-less networks, such as body area networks, rely on the proximity and honesty of devices within the network to achieve their security goals. However, there does not exist a security framework that supports the formal analysis of such protocols, leaving the door open to unexpected flaws. In this article we introduce such a security framework, show how it can be implemented in the protocol verification tool Tamarin, and use it to find previously unknown vulnerabilities on two recent key exchange protocols.