Hardware-Trojan-resisting circuit design method based on activation probability analysis

Abstract

The invention relates to the field of testability design of an integrated-circuit technology and discloses a hardware-Trojan-resisting circuit design method based on activation probability analysis. The method mainly includes two parts: a first part: circuit design of a probability fuzziness unit and a second part: an insertion algorithm of the probability fuzziness unit. Targeting at characteristics of high elusiveness and high perniciousness of hardware Trojans, through analysis of a circuit node activation probability, the method selects an appropriate node to insert the probability fuzziness unit circuit so that an attacker is incapable of correctly judging a signal jumping probability of nodes in the circuit and inserts hardware Trojans only based on the circuit which undergoes probability fuzziness. Compared with the prior art, the hardware-Trojan-resisting circuit design method based on activation probability analysis is capable of strengthening the hardware Trojan resisting capability of a design circuit so that implanted hardware Trojans are incapable of achieving a specific objective designed by an attacker and are easily detectable in a test period.

Description

technical field [0001] The invention relates to the field of testability design of integrated circuits, in particular to an anti-hardware Trojan horse circuit design method based on activation probability analysis. Background technique [0002] In the era of information technology, software security issues have been highly valued, but the security threats of hardware, which is the foundation of software applications, are often underestimated. In 2005, in a report of the US National Defense Science Board, it was first proposed that due to the separation of the design and production process of integrated circuits, there will be credibility problems in the supply of integrated circuits [1]. The separation of integrated circuit design and production process means that integrated circuit design manufacturers adopt the method of foundry for circuit production [2]. With the trend of globalization of the integrated circuit industry in recent years, a circuit chip often needs to be ...

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to provide a circuit design method capable of resisting hardware Trojan horse attacks in view of the characteristics of strong concealment and great harm of Trojan horse circuits, and to increase the probability that implanted Trojan horse circuits are detected during the testing phase , and make it impossible to achieve specific malicious purposes when the circuit is working normally

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