PUF device based on microcavity laser

Abstract

The invention discloses an optical PUF based on microcavity laser. The optical PUF comprises a substrate and semiconductor microspheres, wherein the semiconductor microspheres grow on the surface of the substrate, and the density, the position, the size, the morphology and the contact number of the semiconductor microspheres change randomly. By using excellent gain and resonance characteristics of the semiconductor microspheres, high-quality narrow-linewidth single-mode microcavity laser output is realized under a relatively low pumping threshold. Based on modulation of laser wavelength by a semiconductor microcavity, random spectral response formed by high-intensity narrow-linewidth lasing peaks can be realized by utilizing random diversity of microsphere characteristics in a microsphere preparation process, hardware fingerprint characteristics are realized, and due to unclonable preparation randomness and an unpredictable excitation-response physical mechanism, the optical PUF is difficult to be reversely cracked, copied and tampered. Therefore, the optical PUF provided by the invention is a safe physical unclonable functional device.

Description

technical field [0001] The invention relates to the fields of information security and semiconductor optoelectronic technology, in particular to a physical function unclonable (Physical Unclonable Function, PUF for short) device based on a microcavity laser. Background technique [0002] Smart devices and data storage are the cornerstones of the evolution and development of contemporary civilization, especially in fields that have extremely high requirements for information security, such as anti-counterfeiting, identity authentication, and key communication, and unique security keys are urgently needed. The generation, storage, and retrieval of security keys are highly dependent on pseudo-random number algorithms or PUFs with hardware digital fingerprints, which put forward the basic requirements of being non-replicable and unpredictable. Although the pseudo-random number algorithm has developed rapidly in the field of information security, the scheme has long faced problem...

AI Technical Summary

Problems solved by technology

The optical PUF based on light scattering is not robust enough and is disturbed by fingerprints and scratches formed during use

The choice of metal materials in this patent is mainly to use metal particle plasmon resonance to enhance the absorption of specific wavelengths, which is convenient for using specific wavelengths to melt and change the structure of metal particles to achieve the purpose of structural renewal. The choice of metal materials itself is not directly related to optical PUF encoding.

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