A Method for Detecting Motherless Hardware Trojan Horse Based on Thermal Gradient Array

Abstract

The invention discloses a method for detecting a Trojan horse without a parental hardware based on a thermal gradient array. The steps include: S1. Filling a plurality of ring oscillators of different stages as a thermal gradient array into a logical vacant area of ​​a target chip in advance; S2. When the target chip is detected, obtain the infrared image of the target chip in the thermal working mode; S3. Obtain the heat gain map of the thermal gradient array according to the infrared image; S4. Determine whether the heat gain map obtained in step S3 is consistent with the original filling design Compared with the standard heat increment map of the thermal gradient array, whether there is any missing or changed, if it is determined that there is a hardware Trojan implanted. The invention has the advantages of simple implementation method, low cost, accurate detection of various hardware Trojan horse implantation methods, and high difficulty in hardware Trojan horse implantation.

Description

technical field [0001] The invention relates to the technical field of hardware Trojan horse detection, in particular to a method for detecting a hardware Trojan horse without a parent based on a thermal gradient array. Background technique [0002] The hardware Trojan horse is the intentional tampering of the circuit. The design of the hardware Trojan horse exists in the entire IC design and manufacturing process. It mainly uses the internal redundant state of the circuit or the redundant area in the layout to tamper with the target circuit purposefully during the design process, thereby To achieve the purpose of tampering with circuit functions, leaking confidential information, or paralyzing the system unconditionally or under preset trigger conditions. In short, a hardware Trojan horse is a tiny logic added to a normal design to achieve malicious purposes. [0003] Aiming at the threat of hardware Trojans, two methods are usually used: trusted security design and hardwar...

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned method of simply implanting the trustworthy security design of the ring oscillator is still to detect the infrared signal of the hardware Trojan horse in the infrared background of the normal operation of the chip, so there will still be detection phenomena that are not obvious, and the heat generation information will be lost. Covered by temperature information, post-processing is difficult and other problems; and the simple ring oscillator implantation cannot resist targeted hardware Trojan attacks, there is the possibility that the attacker uses the transistor in the ring oscillator to implant hardware Trojans, anti-hardware The ability to implant Trojan horses still needs to be improved

Images