Reusing logic masking to facilitate path-delay-based hardware Trojan detection

Hardware Trojan (HT), Integrated Circuit (IC) piracy, and overproduction are three important threats which may happen in untrusted foundries. Design changes against HTs, so-called Design-For-Hardware-Trust (DFHT), are used in order to facilitate the HT detection. In addition, logic masking has been proposed against IC piracy and overproduction. In this work, we propose a DFHT method reusing the circuitry dedicated to logic masking in order to improve the HT detection based on the path delay analysis.