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An identity verification system based on cavity-type photorefractive crystal puf

A technology for photorefractive crystals and identity verification, which is applied in the field of identity verification systems based on cavity-type photorefractive crystals PUF, can solve the problems of poor security and low anti-deciphering, and achieve high security, strong anti-deciphering, The effect of enhancing the ability of the local light

Active Publication Date: 2022-06-21
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides an identity verification system based on cavity-type photorefractive crystal PUF in order to solve the problems of poor security or low deciphering resistance existing in the existing optical PUF identity verification system

Method used

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  • An identity verification system based on cavity-type photorefractive crystal puf
  • An identity verification system based on cavity-type photorefractive crystal puf
  • An identity verification system based on cavity-type photorefractive crystal puf

Examples

Experimental program
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Effect test

Embodiment 1

[0052] An identity verification system based on a cavity-type photorefractive crystal PUF, the user holds the PUF: it includes two working stages, namely a registration stage and an authentication stage, which are realized through the following steps:

[0053] 1) Registration stage:

[0054] ①Light source 1 is used as the pump light source, and a vertically polarized laser with a wavelength of 632.8 nm is used to generate a P-polarized Gaussian beam with a beam intensity of 2w;

[0055] ②The beam passes through the beam expansion and collimation system PBES2 for beam expansion and collimation, and the polarization state of the beam is not affected in the process;

[0056] ③ After beam expansion, collimation and a certain width of the outgoing beam, it is irradiated on the spatial modulator SLM3, the beam phase is affected by the modulation information matrix, the light intensity distribution is changed, and the excitation light with a certain angle and light field distribution...

Embodiment 2

[0068] An identity verification system based on cavity-type photorefractive crystal PUF, the user holds the plaintext pattern; the optical PUF module in the system is fixed, the user carries the plaintext pattern, and authenticates in the security system, including two working stages, namely registration Stage and certification stage, through the following steps to achieve:

[0069] 1) Registration stage:

[0070] ①Light source 1 is used as the pump light source, and a vertically polarized laser with a wavelength of 632.8 nm is used to generate a P-polarized Gaussian beam with a beam intensity of 2w;

[0071] ②The beam passes through the beam expansion and collimation system PBES2 for beam expansion and collimation, and the polarization state of the beam is not affected in the process;

[0072] ③ After beam expansion, collimation and a certain width, the outgoing beam is irradiated on the spatial modulator SLM3, the beam phase is affected by the modulation information matrix,...

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Abstract

The invention discloses an identity verification system based on a cavity-type photorefractive crystal PUF, and relates to the fields of information security and identity verification. It includes a light intensity modulation module, an optical PUF module and a lens module arranged in sequence from left to right along the optical path, and also includes a data processing module. The light intensity modulation module includes a light source, a beam expander collimation system PBES and a spatial modulator SLM; the optical PUF module consists of two optical PUF diffusers and four flat mirrors, and each optical PUF diffuser consists of two glass plates and zirconium Iron double doped lithium niobate LiNbO 3 Composed of Fe, Zr granular crystals, two optical PUF scattering sheets are wrapped and fixed by four plane mirrors to form a cavity structure; the lens module includes a positive lens, and the data processing module includes a CCD camera and a computer; the CCD camera passes through the serial The data port is connected to a computer, and the computer contains an extraction program. The invention changes the doping material and structure, so that the identity verification system has higher security and strong deciphering resistance.

Description

technical field [0001] The invention relates to the fields of information security and identity verification, in particular to an identity verification system based on a cavity-type photorefractive crystal PUF. Background technique [0002] With the development of technology and network, security systems for "personal identity" verification have become popular in people's lives. However, the security problems of authentication still plague us, such as: the system is deciphered, the token is cloned, and the identity information is tampered with. Therefore, it is urgent to study new authentication methods and tools. [0003] Physical Unclonable Functions (PUF) is a physical entity that introduces randomness in the manufacturing process. Because of its random physical differences, it has natural characteristics that are difficult to clone or forge, so it can fully control the micro- and nano-scale in the physical medium. Making a difference is very difficult. Therefore, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/45G02F1/35G02F1/355
CPCG06F21/45G02F1/3503G02F1/3551
Inventor 常朋发王晨郭园园王龙生贾志伟王安帮
Owner TAIYUAN UNIV OF TECH
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