Optical encryption based on the algorithm of compressive ghost imaging and phase-shifting digital holography

Zhang, Leihong; Xiong, Rui; Zhang, Dawei; Chen, Jian

doi:10.3116/16091833/19/3/179/2018

Cited by 2 publications

(3 citation statements)

References 13 publications

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“…In recent years, CS-based optical encryption methods have been increasing the demand for many optical information processing applications [41][42][43][44][45][46][47][48][49][50][51][52][53].…”

Section: Introductionmentioning

confidence: 99%

“…Finally, the intensity of the original object wavefield was decrypted from the reconstructed holograms by the inversion of PSDH process. Leihong et al [48] have experimentally presented compressive ghost imaging encryption based on PSDH. e simulation results have shown that the CS scheme improved the security and reconstruction quality of the intensity image.…”

Section: Introductionmentioning

confidence: 99%

“…It has been numerically presented that the one RPM key at different recording distances minimized the key storage requirement of data transmission and also enhanced the robustness of the encryption system. e encryption systems [44][45][46][47][48][49][50] were proposed based on inline schemes such as four-step, three-step, or twostep PSDH. Moreover, the phase reconstruction of the encrypted object field is not presented in the single-pixel compressive holography.…”

Section: Introductionmentioning

confidence: 99%

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Single-Pixel Compressive Digital Holographic Encryption System Based on Circular Harmonic Key and Parallel Phase Shifting Digital Holography

Reddy

Nelleri

2022

International Journal of Optics

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An encryption system that combines compressive sensing (CS) and two-step parallel phase shifting digital holography (PPSDH) using double random phase encoding (DRPE) is presented in this paper. The two-step PPSDH is a linear inline holographic scheme and is much suitable for encrypting the 2D/3D information in a single exposure. The distribution of random phase mask (RPM) in the DRPE is implemented using circular harmonic key which increases the security of the encryption process. In this system, the keys used to encrypt are spatial positions of the planes, wavelength, and rotation of the circular harmonics in RPMs, and CS acts as an additional key that makes the system more secure than the conventional optical encryption methods. At the transmission end, two-step PPSDH is applied to encrypt the object information in single hologram. The digital mirror device (DMD) is placed between the object and a single-pixel detector for acquiring fewer hologram measurements. At the receiver end, the single digital hologram is numerically recovered by using a CS optimization problem. The original complex object field is decrypted from the CS recovered holograms by the inversion of two-step PPSDH process with the help of the correct keys. The numerical simulations are presented for complex 2D and 3D objects to test the feasibility of the proposed encryption and decryption system. The proposed method carried out intensity and phase reconstruction of the original object field using single-pixel compressive imaging. The computer simulation results demonstrated that the encrypted information is highly secured with the rotation of the circular harmonic key. The sensitivity of the decrypted intensity and phase images is also studied with variations of the encrypted keys. The obtained results show that the proposed encryption scheme is feasible and has better security performance and robustness.

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