An integrated circuit for defending hardware Trojan horse and an encryption method thereof

Abstract

The invention relates to an integrated circuit for defending hardware Trojan horse and an encryption method thereof. The method comprises the following steps of acquiring a first integrated circuit byusing a logic encryption circuit; obtaining a second integrated circuit according to the Hamming distance of the first integrated circuit; obtaining a third integrated circuit according to the Hamming distance of the second integrated circuit; obtaining a third integrated circuit according to the Hamming distance of the first integrated circuit and the Hamming distance of the second integrated circuit; and obtaining a fourth integrated circuit according to the number of iterations of the third integrated circuit and a predetermined number of iterations. According to the encryption method, enough protection can be provided for the internal nodes and function output of an original circuit at the same time, threats of hardware Trojan, infringement, piracy and other attack behaviors are effectively resisted, and the time sequence, the area and the power consumption cost are low.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, and in particular relates to an integrated circuit for defending hardware Trojans and an encryption method thereof. Background technique [0002] An integrated circuit (integrated circuit) is a tiny electronic device or component. Integrated circuits have the advantages of small size, light weight, fewer lead wires and soldering points, long life, high reliability, and good performance. At the same time, their cost is low and they are convenient for mass production. It is not only widely used in industrial and civil electronic equipment (such as radio recorders, televisions, computers), etc., but also in military affairs, communications, remote control, etc. [0003] When the integrated circuit industry just started, due to the small design scale, relatively simple process technology, long design and manufacturing cycle, and low cost, integrated circuit manufacturers were able to rea...

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Problems solved by technology

[0005] However, the obfuscation effect of the first method depends largely on the number and location of triggers, so it cannot guarantee sufficient protection for internal nodes and function outputs, and there have been many researches on obfuscation and logic encryption. This method is easy to be cracked by the attacker because it does not provide enough protection for the correct key; the second method needs to insert enough key gates into the original circuit in order to ensure the quality of logical encryption. , which in turn introduces excessive timing, area and power consumption overhead, and for the existing attack methods to crack the key, this method does not take sufficient protection measures, so it is easy to be cracked by the attacker

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