Physically Related Functions: A New Paradigm for Light-weight Key-Exchange

In this paper, we propose a novel primitive named Physically Related Function (PReF) which are devices with hardware roots of trust. It enables secure key-exchange with no pre-established/embedded secret keys. This work is motivated by the need to perform keyexchange between lightweight resource-constrained devices. We present a proof-of-concept realization of our contributions in hardware using FPGAs.