Hardware Trojan-resisting circuit design method based on blurring processing

Abstract

The invention discloses a hardware Trojan (Hardware Trojan)-resisting circuit design method based on blurring processing. The method primarily comprises two parts: the first part is a finite-state machine (FSM); the second part is an original circuit with a modified D trigger structure, wherein the Q end and the non-Q end of the D trigger are connected to a multiplexer MUX; and signals of the control end of the MUX come from the FSM. According to the hardware Trojan-resisting circuit design method provided by the invention, the finite-state machine is added in a circuit; on the one hand, the states which circuits can reach are increased, on the other hand, attackers have no way to obtain information of the normal work modes of the circuits and only can add Trojans based on a blurring mode; however, the Trojans can be detected in the circuit test process. In comparison with the prior art, the protective degree for the normal work modes of the circuits is enhanced; the malicious party has difficulty to add effect Trojans; and the added Trojans can be detected more easily.

Description

technical field [0001] The invention relates to an anti-hardware Trojan horse circuit design method, in particular to a hardware Trojan horse circuit design method based on fuzzy processing. Background technique [0002] With the continuous acceleration of the globalization process of integrated circuit production, more and more integrated circuit manufacturers choose to conduct circuit production through outsourcing. The advantage of outsourcing production is that it greatly saves costs and shortens the time from design and production to market launch. However, the outsourced production method separates circuit design from manufacture, that is, a malicious third party may have the opportunity to modify the design during the entire circuit production process. This will have a crucial impact on the authenticity (authentication) and credibility (trust) of the circuit. Malicious parties (adversary) can modify the structure of the circuit during the production process, that is...

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is: the D flip-flop is controlled by the decoder, so the attacker can exhaust the input of the decoder, and then infer the complete state set of the circuit, so as to implement a more effective attack

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