Circuit designing method for improving hardware Trojan detecting resolution based on power supply isolation and hardware Trojan detecting method

Abstract

The invention provides a circuit designing method for improving hardware Trojan detecting resolution based on power supply isolation and a hardware Trojan detecting method. The circuit design method comprises the following steps: firstly, dividing a circuit into different areas according to a certain rule; secondly, designing an independent power supply network for each divided area, and controlling the on-off state of a power supply of each divided area by utilizing a power supply isolation unit; thirdly, producing a plurality of test vectors in the circuit by adding a self-testing module or utilizing the self-testing module which is in the circuit, wherein the vectors can serve as the input of each divided area in the circuit; finally, completely turning off the power supplies of other areas which are not required to be used during a chip testing process, and only testing side channel data when only one area works, so that the proportion of the side channel data produced by the hardware Trojan in the overall circuit side channel data is increased. The circuit which contains the hardware Trojan and the circuit which does not contain the hardware Trojan are distinguished better, so that the detecting resolution of the hardware Trojan is improved.

Description

technical field [0001] The present invention relates to a circuit design method based on power isolation to improve the detection resolution of hardware Trojans and a detection process for hardware Trojans, especially a design that makes hardware Trojans easier to detect by adding additional circuits in the circuit design stage The method and detection process are especially suitable for detecting hardware Trojan horses with small circuit scales. Background technique [0002] Integrated Circuit (IC, Integrated Circuit) design and manufacturing process often involves third-party design services, IP (Intellectual Property), EDA (Electronic Design Automation) software, and uncontrolled fabs and packaging and testing plants , in these links, the chip is likely to be artificially modified, such as maliciously adding, deleting or changing the original circuit structure inside the chip, or changing the process parameters in the manufacturing stage to affect the normal operating par...

AI Technical Summary

Problems solved by technology

The biggest advantage of hardware Trojan detection based on side channel analysis on circuits is that the hardware Trojan can be detected without being triggered. The size of the implanted hardware Trojan is very small, and some side channel information, such as current and path delay, have very small changes

Considering the noise introduced in the measurement process and the noise caused by process drift in the chip manufacturing process, this extremely small side channel signal change will not be actually measured or even if it is measured, it is difficult to determine that it is caused by a hardware Trojan , or due to measurement noise, process drift noise

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