Novel PUF circuit system structure

Abstract

The invention discloses a novel PUF (physical unclonable function) circuit system structure which structurally comprises a technology sensitivity circuit, a deviation amplification circuit, a deviation comparison circuit, a hand showing circuit and a diffusion circuit which are connected sequentially, wherein the technology sensitivity circuit is used for acquiring technology deviation, and generating two or more signals with different physical properties; the deviation amplification circuit is used for amplifying a physical property difference among the two or more weak signals with the different physical properties; the deviation comparison circuit generates a 0 / 1 output according to the physical property difference among the two or more signals with the different physical properties and a certain rule; the hand showing circuit samples 0 / 1 output results generated by the deviation comparison circuit repeatedly, and generates a judgment output according to probability distribution of the output results; and the diffusion circuit converts one or more results generated by the hand showing circuit according to a certain algorithm, and allows probability statistics of the results to meet a requirement of uniform distribution. According to the structure, the output generated by the PUF structure is good in statistical distribution characteristic and high in stability.

Description

technical field [0001] The invention mainly relates to the design field of PUF-based identity authentication, key generation and anti-counterfeiting technology, and particularly refers to a novel PUF circuit architecture. Background technique [0002] The Physical Unclonable Function (PUF for short) was first proposed by Pappu in "Physical One-Way Functions" in March 2001, and soon appeared a variety of methods based on the principles of optics, electromagnetism and electronics. The PUF structure is widely used in the fields of identity authentication, security key generation and anti-counterfeiting technology. With the rapid development of integrated circuit technology, integrated circuit chips using PUF technology also appear soon, and are widely used in the fields of chip security and anti-counterfeiting. The PUF circuit mainly generates an infinite number of unique and unclonable outputs by capturing the inevitable process deviation of the chip during the manufacturing ...

AI Technical Summary

Problems solved by technology

For example, the PUF circuit based on dual-stacked reverse delay units is less sensitive to the process, but as the power supply voltage changes, the delay time of the delay unit remains basically unchanged, so the uniqueness of the PUF output is poor and the stability is relatively low. Good; the PUF circuit based on the current starvation delay unit has good sensitivity to the process, but with the change of the power supply voltage, the delay time of the delay unit has a large change, so the uniqueness of the corresponding PUF output is good and stable bad sex

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