Hybrid PUF circuit

Abstract

The invention discloses a hybrid PUF circuit, comprising a basic PUF circuit and a control PUF circuit, wherein a decision type PUF circuit achieves the basic PUF circuit, a register and an initial electrification value PUF circuit are alternately arranged to achieve the control PUF circuit, a control signal stored in the register and a signal generated by the initial electrification value PUF circuit are spliced to form n bits of excitation signals to serve as enabling signals of the basic PUF circuit, each bit of excitation signal needs to pass through two different delay paths composed of a first delay circuit unit and a second delay circuit unit in the basic PUF circuit, the output data of the basic PUF circuit are generated by a delay difference between the two delay paths, in the two delay paths, each delay circuit unit completes an on-off operation according to the corresponding excitation signal, determines to propagate a rising edge signal linearly or crosswise and finally generates a PUF output signal through a decision device; and the hybrid PUF circuit has the advantages of higher reliability and randomness and stronger model attack and machine learning attack resistance.

Description

technical field [0001] The invention relates to a PUF circuit, in particular to a hybrid PUF circuit. Background technique [0002] The physical unclonable function circuit (PUF) uses the uncontrollable random changes in the chip manufacturing process to generate low-cost key information, which is applied to IC authentication to prevent cloning, imitation and forgery of circuits. In the actual encryption technology, the PUF circuit generates an infinite number of unique key information by extracting the texture features of the chip, which can be used for device authentication and security applications, which can improve system security and reliability, and has been widely used in Security field and anti-counterfeit chip. In addition, the data of a single PUF circuit must be easy to extract, even if its circuit structure and manufacturing process are known, the same output data cannot be reproduced. Variations at the circuit behavior level include manufacturing process vari...

AI Technical Summary

Problems solved by technology

The power-on initial value PUF circuit has an excellent effect on dealing with model attacks, but the effect on dealing with machine learning attacks is average; while the decision-based PUF circuit has excellent effects on dealing with machine learning ...

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