A physical-layer design for distance bounding system

Boris DANEV -
Digital Security

Date: -
Location: Eurecom

A distance bounding system must guarantee an upper bound on the physical distance between a verifier and a prover. However, in contrast to a conventional wireless communication system, the tight requirements on the processing delay at the prover and distance measurement precision makes the practical realization of such a system very challenging. While a number of works have addressed distance bounding on the logical layer, the physical-layer aspects of the data communication and distance estimation supporting distance bounding protocols have been largely neglected. The latter is important not only for the realization of a practical distance bounding system, but also for being able to thoroughly analyze its security. In this talk, we will discuss the design of a physical layer for distance bounding. Our physical layer combines the frequency modulated continuous wave (FMCW) and backscatter communication principles to allow the full implementation of a distance bounding system. We evaluate our proposal under various attack scenarios and show that it offers strong security guarantees against distance, mafia and terrorist frauds.