关键词: 硬件木马, 侧信道分析, 工艺偏差

Abstract: Side channel analysis technology is the main detection method of hardware Trojan. Because the side channel signal is affected by process variations, its application is limited. Aiming at this problem, this paper proposes a FPGA hardware Trojan detection using power analysis considering process variation. Considering the relationship between threshold voltage and chip current, the influence of process variations on chip power is analyzed. Hspice is used to simulate the effect of process variation on CMOS power by changing the main process parameters. Simulation results of Hspice show that the fluctuation range of the power of the FPGA chip is ±5% under the influence of process variation. Xpower is used to analyze the power of chips with and without hardware Trojan under the influence of process variation. Finally, the proposed method is verified by the actual power measurement results of FPGA. The proposed analysis method can calculate the fluctuation range of FPGA power under process variation. It provides effective theoretical basis for hardware Trojan detections based on side channel analysis, and improves the reliability of detections.

Key words: hardware Trojan, side channel analysis, process variation