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Identity verification system based on cavity type photorefractive crystal PUF (physical unclonable functions)

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 degree of resistance to deciphering, and achieve high security, strong resistance to deciphering, The effect of enhancing the ability of the local light

Active Publication Date: 2021-09-17
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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  • Identity verification system based on cavity type photorefractive crystal PUF (physical unclonable functions)
  • Identity verification system based on cavity type photorefractive crystal PUF (physical unclonable functions)
  • Identity verification system based on cavity type photorefractive crystal PUF (physical unclonable functions)

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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 of the outgoing beam, it is irradiated on the spatial modulator SLM3, the beam phase is affected by the modulation information m...

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Abstract

The invention discloses an identity verification system based on a cavity type photorefractive crystal PUF, and relates to the field of information security and identity verification. The system comprises a light intensity modulation module, an optical PUF module and a lens module which are sequentially arranged from left to right along a light path, and also comprises a data processing module. The light intensity modulation module comprises a light source, a beam expanding collimation system and a spatial modulator; the optical PUF module is composed of two optical PUF scattering sheets and four plane mirrors, each optical PUF scattering sheet is composed of two glass plates and zirconium-iron double-doped lithium niobate LiNbO3Fe and Zr granular crystals, and the upper portion, the lower portion, the front portion and the rear portion of the two optical PUF scattering sheets are wrapped and fixed by the four plane mirrors to form a cavity structure; and the lens module comprises a positive lens. The data processing module comprises a CCD camera and a computer. The CCD camera is connected to a computer through a serial data port, and the computer contains an extraction program. According to the invention, the doping material and the structure are changed, so that the identity authentication system has higher security and strong decoding 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 Applications(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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