Circuit safety DFT (design for testability) method for accelerating hardware Trojan trigger and hardware Trojan detection method

Abstract

The invention relates to a circuit safety DFT (design for testability) method for accelerating hardware Trojan trigger. The method comprises the following steps: firstly, function design and verification of a circuit are finished; secondly, clock frequency higher than that during normal operation is selected and taken as the clock frequency of a safe test mode; then work including corresponding synthesis, scan chain insertion, placing and routing, static timing analysis and the like is finished, and exactly correct functions and timing sequences for function test and scan chain test under the clock frequency of the safe test mode are guaranteed. Therefore, after the circuit is manufactured, the circuit is configured with the safety test mode with high clock frequency, and for hardware Trojans such as time bomb type hardware Trojans having a time-dependent trigger condition, the hardware Trojan trigger probability can be accelerated remarkably when the circuit designed with the method is used. The design method can further increase the hardware Trojan implantation difficulty.

Description

technical field [0001] The invention relates to a circuit security testability design method capable of accelerating the triggering of hardware Trojan horses, especially a design method and detection process that make hardware Trojan horses easier to trigger by adding additional circuits in the circuit design stage, especially suitable for detection needs A hardware Trojan that takes a long time to trigger. Background technique [0002] With the development of the integrated circuit industry towards global cooperation, more and more third parties are involved in the integrated circuit industry chain, which makes more and more uncontrolled factors in the design and manufacturing process of integrated circuits. This raises concerns about the security of integrated circuits. Due to the participation of third-party uncontrolled links, integrated circuits are easily modified maliciously and implanted into hardware Trojan horses during the design and manufacturing process. Some ...

AI Technical Summary

Problems solved by technology

[0004] The above two types of methods can detect a certain type of specific hardware Trojan to a certain extent, but both rely on the need to trigger the hardware Trojan or require the hardware Trojan to be in a working state all the time, which affects the relationship between circuit power consumption and frequency, and path delay. information

However, for hardware Trojans that will be triggered after a long time, the above two types of methods are more difficult to effectively detect

Images