Hardware trojan detection method and system based on time delay

Abstract

The invention discloses a hardware trojan detection method and system based on time delay. The method comprises the following steps of firstly obtaining bypass time delay information of a chip to be detected, wherein the bypass time delay information includes an amplitude frequency response curve and/or a phase frequency response curve of each signal path of the chip to be detected; obtaining the resonance valley frequency and the resonance peak frequency of each signal path in the chip to be detected according to the bypass time delay information; finally and respectively comparing the resonance valley frequency and the resonance peak frequency of each signal path in the chip to be detected with the corresponding preset resonance valley frequency threshold and the resonance peak frequency threshold of each signal path; judging whether hardware Trojan exists in the chip to be detected or not according to the comparison result. The addition of the additional chip area for test is not needed, the workload and the test cost are greatly reduced, and the work efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of integrated circuit detection, in particular to a delay-based hardware Trojan detection method and system. Background technique [0002] With the development of semiconductor technology, hardware outsourcing design and tape-out has become a global trend. In recent years, a new type of hardware attack method targeting integrated circuit chips has emerged, called "hardware Trojan horse". Hardware Trojans mainly refer to artificially maliciously adding some illegal circuits or tampering with original design files in the process of IC (integrated circuit, integrated circuit) design and manufacturing, thereby leaving "time bombs" or "electronic backdoors". [0003] The existing hardware Trojan detection method mainly judges whether there is a Trojan in the chip by detecting and analyzing the bypass signal in the circuit, such as the maximum operating frequency, delay, power consumption, static and dynamic curre...

AI Technical Summary

Problems solved by technology

However, the traditional hardware Trojan detection based on bypass signal analysis needs to insert shadow registers or ring oscillators in the critical path of the integrated circuit to characterize the delay characteristics of the chip or scan and monitor the clock of the critical path. When the integrated circuit has more than one million path, the hardware Trojan may not necessarily be parasitic in the critical path, so inserting shadow registers or ring oscillators into the critical path or performing clock scan monitoring may not be able to detect the hardware Trojan. If you increase the detection of non-critical paths, you need to add Additional chip area for testing will greatly increase workload and test cost

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