Method for detecting hardware Trojan based on active optical watermark

Abstract

The invention relates to a method for detecting hardware Trojan based on an active optical watermark. The method comprises the steps of inserting some special units which do not influence the circuit function and have the temperature superior to that of the surrounding adjacent units after being electrified into a circuit and distributing to the layout according to a certain rule, wherein such special units are the active optical watermarks of the circuit; simulating to obtain the heat distribution map of the whole circuit while electrifying; performing the same test to the circuit and photographing after the circuit is manufactured and before packaging; comparing the simulated watermarks with the actual watermarks; if the watermark position changes or disappears, determining that the hardware Trojan is in the circuit. With the adoption of the method, the circuit is avoided various complex tests; the influence of the process noise and measurement noise in the traditional method can be overcome; the detection complexity can be obviously reduced; the detection accuracy can be improved.

Description

technical field [0001] The invention relates to a hardware Trojan detection method based on active optical watermarking, especially a method that does not require complex testing of the circuit and can overcome the influence of process noise and measurement noise on the circuit, and is especially suitable for low-complexity hardware Trojan detection. Detection method. Background technique [0002] In the process of designing and manufacturing integrated circuits, third-party design services, IP (intellectual property core), EDA (electronic design automation) software, and uncontrolled fabs and packaging and testing plants are often involved. , the chip is likely to be artificially modified, such as maliciously adding, deleting or changing the original circuit structure inside the chip. This kind of malicious circuit modification that will affect the function, performance, reliability, and security of the circuit is called It is a hardware Trojan horse. Since manufacturing ...

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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