Glitch-type PUF circuit employing delay tree structure

Abstract

The invention discloses a glitch-type PUF circuit employing delay tree structure, and the structure comprises a time sequence control circuit, a shift register, n delay tree circuits with the same bit structure, a delay sampling circuit, an output circuit, and n input XOR gates. The delay sampling circuit comprises n delay sampling units with the same structure, and each delay sampling unit comprises a first phase inverter and a D contactor. Each Glitch generation circuit consists of multi-stage '1' hazard circuits and '0' hazard circuits. The time sequence control circuit provides clock signal for the shift register, the delay sampling circuit and the output circuit. The time sequence control circuit enables control information to be stored in the shift register, and an input signal inputted to an n-bit Glitch generation circuit sequentially passes through each delay sampling unit of the delay sampling circuit. Each delay sampling unit decides the output data of the PUF circuit. The shift register enables the output data to be outputted to the output circuit, and to serve as the output data of the glitch-type PUF circuit. The circuit is advantageous in that the circuit is remarkable in nonlinear characteristics and can effectively solve a model attack problem.

Description

technical field [0001] The invention relates to a PUF circuit, in particular to a burr-type PUF circuit adopting a delay tree structure. Background technique [0002] In modern information security systems, Physical Unclonable Functions (Physical Unclonable Functions, PUF) circuits have been widely used as identity authentication and anti-counterfeiting means, such as smart cards, credit cards, electronic tags (Radio Frequency Identification Devices, RFID), mobile phones, security Video cameras and gaming equipment and more. The PUF circuit belongs to the chip feature recognition circuit, which is unique, random and unclonable. By extracting the unavoidable process deviation introduced in the chip manufacturing process, an infinite number of unique data information is generated. Applying PUF circuits to security devices can effectively defend against traditional attack modes, such as mathematical attacks, virus attacks, differential power consumption attacks, and collision ...

AI Technical Summary

Problems solved by technology

With the increase of attack modes, it will seriously affect the practical process of PUF circuits

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