Two-way interference type identity verification system based on photorefractive crystal PUF
A technology of photorefractive crystals and identity verification, applied in user identity/authority verification, transmission systems, digital transmission systems, etc., can solve problems such as poor security and low anti-deciphering degree, increase influence and reduce working pumping threshold , the effect of enhancing the ability of local light
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Embodiment 1
[0052]A two-way interference authentication system based on photorefractive crystal PUF. The user carries the optical PUF module and performs authentication in the security system. It includes two working stages, namely the registration stage and the authentication stage, which are realized through the following steps:
[0053] 1) Registration stage:
[0054] ① Light source 1 is used as a pump light source, using a vertically polarized laser with a wavelength of 632.8nm to generate a P-polarized Gaussian beam with a beam intensity of 2w;
[0055] ②The beam expands and collimates through the beam expander and collimator system PBES2, and the polarization state of the beam is not affected during the process;
[0056] ③ After beam expansion, collimation and exit beam with a certain width, it is irradiated on the spatial modulator SLM3, and the phase of the beam is affected by the modulation information matrix, which changes the light intensity distribution and generates excitatio...
Embodiment 2
[0069] A two-way interference authentication system based on photorefractive crystal PUF. The optical PUF module in the system is fixed, and the user carries a plaintext pattern to authenticate in the security system. It includes two working stages, namely the registration stage and the authentication stage. This is achieved through the following steps:
[0070] 1) Registration stage:
[0071] ① Light source 1 is used as a pump light source, using a vertically polarized laser with a wavelength of 632.8nm to generate a P-polarized Gaussian beam with a beam intensity of 2w;
[0072] ②The beam expands and collimates through the beam expander and collimator system PBES2, and the polarization state of the beam is not affected during the process;
[0073] ③ After beam expansion, collimation, and a certain width of the outgoing beam, it is irradiated on the spatial modulator SLM3, and the phase of the beam is affected by the modulation information matrix, which changes the light int...
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