Thermal Sensor Based Hardware Trojan Detection in FPGAs
Lampros Pyrgas, Filippos Pirpilidis, Aliki Panayiotarou, Paris Kitsos · 2017
This paper introduces an efficient technique for the detection of malicious hardware, based on thermal sensors. Each sensor consists of a Ring Oscillator with three inverters, a control multiplexer and a compact Residue Number System ring counter requiring only two FPGA slices. The sensors were placed in a 6×5 grid structure in equal distance from each other, in order to cover the whole area of the FPGA implementation causing a total overhead of only 1.9 %. To emulate a Hardware Trojan, a 64-bit Linear Feedback Shift Register was used. We demonstrate the proposed technique with an experimental system based on a XILINX Basys 3 board. The results from the experiments illustrate the efficiency of the proposed technique. According to our knowledge we are the first that we have used this kind of sensor for Hardware Trojan Detection.