Hardware Trojan Detection in Implantable Medical Devices Using Adiabatic Computing

In recent years, Hardware Trojans (HT)have become an increasing concern due to outsourcing the manufacturing of Implantable Medical Devices (IMDs). Power Analysis based Side-Channel Attack (SCA)is one of the main methods of detecting HT in IMDs. However, using SCA in detecting trojans is limited by the large process variation effects in IC technology which has reduced detection sensitivity of ultra-small trojans. Along with the safety of IMDs against HTs, the need for power management has also risen in parallel with the increasing complexity of IMDs. In this paper, we are analyzing the usefulness of Differential Power Analysis (DPA)resistant adiabatic logic gates to detect smaller trojans. DPA resistant adiabatic logic gates consume uniform power irrespective of input data transition and also consume lower power compared to conventional CMOS logic gates. When the HT is triggered in the DPA resistant circuits, the circuit will have non-uniform power consumption which will help us to easily identify HTs. In order to validate our proposed methodology, we have implemented a C17 and a carry save adder using a recently proposed DPA resistant adiabatic logic family called Energy-Efficient Secure Positive Feedback Adiabatic Logic Family (EE-SPFAL). Further, in order to calculate the true energy-efficiency of the EE-SPFAL logic, we have proposed a four phase Power Clock Generator (PCG)and integrated with the EE-SPFAL logic circuits. Simulations are performed in Cadence Spectre using 180nm CMOS technology. From our simulations, we have observed the non-uniform power consumption, during the activation of HT, in EE-SPFAL based C17 and carry save adder circuit. Further, EE-SPFAL based C17 and carry save adder along with its PCG consume 25.8% and 31.4% of less power as compared to the conventional CMOS based C17 and carry save adder respectively.