Hardware Trojan Detection Using Slope of Path Delay Trend: Combination of Clock and DC Sweep

Hardware Trojan is a malicious threat to the world of IC. So, finding new and effective ways to detect Hardware Trojans is a concern for the IC design world. The Side Channel Analysis method is a process of detecting Hardware Trojan by measuring circuit parameter and comparing it with the golden circuit (trojan-free circuit). Here, the path delay caused by Hardware Trojan in a digital circuit is measured for detection. However, if the effect of path delay is too small then it is difficult to be detected. So, this paper has focused on two-points. The first point is increasing the path delay and the second one is finding another method that can overcome the problem with an implausible difference between delays of the golden and trojan infected circuit. The whole experiment has been conducted in cadence with a library that has a feature size of 45nm. For the first part, combined sweeping has been done. For the second part, it has been shown that trojan can be detected by measuring the slope of the measured delay.