Hardware Trojan horse detection method based on infrared image detail enhancement

Abstract

The invention discloses a hardware Trojan horse detection method based on infrared image detail enhancement. The method comprises the following steps: S1, A ring oscillator module is implanted in a logic spare area of a target chip in advance, and the normal working mode of a ring vibration heat mode chip is distinguished by configuring the working mode; S2, when the target chip is detected, the infrared image of the chip in the ring vibration heat mode is obtained; S3, noise reduction processing is carried out on the obtained infrared image in the time dimension; S4, an image detail enhancement method is utilized to enhance the spatial dimension of the image after noise reduction processing; S5, the configuration information of the chip implanted ring oscillator module is acquired, and iscompared with the ring vibration thermal mode infrared image after detail enhancement, if the consistent or phase difference result is within the specified range, a condition that there is no hardware Trojan horse implantation can be judged. The method has the advantages of simple operation, low cost, high detection accuracy and efficiency.

Description

technical field [0001] The invention relates to the technical field of chip hardware Trojan horse detection, in particular to a hardware Trojan horse detection method based on infrared image detail enhancement. 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 hardware Trojan ...

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Problems solved by technology

[0005] 1. It is necessary to use a pure mother chip as a reference sample for comparison, which will increase the difficulty of implementation;

[0006] 2. Since the work of the hardware Trojan cannot be completely distinguished from the work of normal logic, detecting infrared signals in a strong infrared background has high requirements for the experimental environment and post-processing. For example, the hardware is detected in the infrared background where the chip works normally. The infrared signal of the Trojan horse, the post-processing of the infrared image detected under this background is relatively difficult, and the extraction of relatively small hardware Trojan infrared data in the thermal background of the chip’s normal operation is not conducive to the subsequent image processing of the hardware Trojan;

[0007] 3. Since it is necessary to use the Kalman filter to denoise the infrared image of the sample and the infrared image of the pure master chip first, then perform differential processing on the two infrared images, and finally perform differential processing on the remaining pixels of the image after the difference, the image processing process is complicated, and In the first differential process, the infrared images of the mother and the sample are extracted independently, and the differential effect cannot be guaranteed

[0008] 4. Since useful information and noise cannot be directly distinguished in the image, detail enhancement and noise reduction in the same dimension are contradictory, that is, while enhancing useful details, useless noise will also be enhanced, while reducing useless noise, also The useful details will be weakened. The above method only completes the noise reduction process in the spatial dimension. While reducing the useless noise, it will also weaken the useful details, so it is still difficult to accurately detect hardware Trojans

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