Abstract. Given the requirements of fast processing and the complexity of RF ranging systems, distance bounding protocols have been challenging to implement so far; only few designs have been proposed and implemented. Currently, the most efficient implementation of distance bounding protocols uses analog processing and enables the prover to receive a message, process it and transmit the reply within 1 ns, two orders of magnitude faster than the most efficient digital implementation. However, even if implementing distance bounding using analog processing clearly provides tighter security guarantees than digital implementations, existing analog implementations do not support resilience against Terrorist Fraud attacks; they protect only against Distance Fraud and Mafia Fraud attacks. We address this problem and propose a new, hybrid digital-analog design that enables the implementation of Terrorist Fraud resilient distance bounding protocols. We introduce a novel attack, which we refer t...