Image Encryption System Based on Joint Transformation Correlation and Ptychography

Zhong, Yuan; Chen, Linfei; Gan, W. S.; Liu, Yuanqian

doi:10.1109/jphot.2019.2921354

Cited by 6 publications

(7 citation statements)

References 28 publications

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“…To increase the accuracy of sample analysis, both in materials science and medicine, as compared to traditional optical detectors, able to receive information only about the intensity and not also of the phase of the light beam, a system for encrypting images was recently proposed, based on both the JTC and the method of ptychography [ 69 ]. At the encryption stage, the scanning movement of the probe (from the ptychography iterative engine) is used to divide the initial image into different parts.…”

Section: Recent Applications and Implementations Of Optical Correlatorsmentioning

confidence: 99%

“…As advantages of the method, one can mention a simplified setup and functioning of the system, due to less strict constraints concerning the alignment and arrangement of components; a better security, due to the presence of numerous keys, that must be all correct for the restoration of the original image; the elimination of optical interference in the system. The feasibility of the method was proven by numerical simulations [ 69 ].…”

Section: Recent Applications and Implementations Of Optical Correlatorsmentioning

confidence: 99%

See 1 more Smart Citation

Optical Correlators for Cryptosystems and Image Recognition: A Review

Drăgulinescu

2023

Sensors

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Optical correlators are efficient optical systems that have gained a wide range of applications both in image recognition and encryption, due to their special properties that benefit from the optoelectronic setup instead of an all-electronic one. This paper presents, to the best of our knowledge, the most extensive review of optical correlators to date. The main types are overviewed, together with their most frequent applications in the newest contributions, ranging from security uses in cryptosystems, to medical and space applications, femtosecond pulse detection and various other image recognition proposals. The paper also includes a comparison between various optical correlators developed recently, highlighting their advantages and weaknesses, to gain a better perspective towards finding the best solutions in any specific domain where these devices might prove highly efficient and useful.

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Section: Recent Applications and Implementations Of Optical Correlatorsmentioning

confidence: 99%

Section: Recent Applications and Implementations Of Optical Correlatorsmentioning

confidence: 99%

Optical Correlators for Cryptosystems and Image Recognition: A Review

Drăgulinescu

2023

Sensors

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“…The technique of double random phase encoding (DRPE) has been extensively shown as an important technique to encrypt images by using optical means [ 7 , 8 ]. This DRPE has been typically implemented with a joint transform correlator (JTC) architecture [ 2 , 4 , 5 , 9 , 10 , 11 , 12 , 13 , 14 ]. The JTC architecture for optical encryption systems commonly uses two random phase masks (RPMs) in its input plane with the purpose of converting a single original image into a stationary white noise signal (encrypted image) in the Fourier domain (FD) [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…With respect to other JTC-based systems developed in former works [ 2 , 5 , 6 , 9 , 10 , 11 , 12 , 13 , 14 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ], the proposed encryption and decryption system for two images allows the simultaneous encryption of two images with a high level of security for the single real-valued encrypted image, besides retrieving high quality decrypted images, either simultaneously or separately. Our encryption and decryption system is not an iterative algorithm, the definitions of the two nonlinear operations applied on the JPS are entirely new, and the use of a new nonlinear JTC allows for breaking the linearity of former JTC-based encryption systems, aiming to obtain an encrypted image better protected against several attacks.…”

Section: Introductionmentioning

confidence: 99%

Double Image Encryption System Using a Nonlinear Joint Transform Correlator in the Fourier Domain

Perez

Pérez‐Cabré

Vilardy

et al. 2023

Sensors

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In this work, we present a new nonlinear joint transform correlator (JTC) architecture in the Fourier domain (FD) for the encryption and decryption of two simultaneous images. The main features of the proposed system are its increased level of security, the obtention of a single real-valued encrypted signal that contains the ciphered information of the two primary images and, additionally, a high image quality for the two final decrypted signals. The two images to be encrypted can be either related to each other, or independent signals. The encryption system is based on the double random phase encoding (DRPE), which is implemented by using a nonlinear JTC in the FD. The input plane of the JTC has four non-overlapping data distributions placed side-by-side with no blank spaces between them. The four data distributions are phase-only functions defined by the two images to encrypt and four random phase masks (RPMs). The joint power spectrum (JPS) is produced by the intensity of the Fourier transform (FT) of the input plane of the JTC. One of the main novelties of the proposal consists of the determination of the appropriate two nonlinear operations that modify the JPS distribution with a twofold purpose: to obtain a single real-valued encrypted image with a high level of security and to improve the quality of the decrypted images. The security keys of the encryption system are represented by the four RPMs, which are all necessary for a satisfactory decryption. The decryption system is implemented using a 4f-processor where the encrypted image and the security keys given by the four RPMs are introduced in the proper plane of the processor. The double image encryption system based on a nonlinear JTC in the FD increases the security of the system because there is a larger key space, and we can simultaneously validate two independent information signals (original images to encrypt) in comparison to previous similar proposals. The feasibility and performance of the proposed double image encryption and decryption system based on a nonlinear JTC are validated through computational simulations. Finally, we additionally comment on the proposed security system resistance against different attacks based on brute force, plaintext and deep learning.

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“…In a word, chaotic encryption provides a new choice for traditional encryption. In recent years, many effective chaos image encryption algorithms have been proposed [13][14][15][16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Networked Chaotic Map Model and Its Applications in Color Multiple Image Encryption

et al. 2020

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In this study, a networked spatiotemporal chaotic map model is proposed based on the traditional coupled map lattice system. In addition, the time delay and variable topology parameters are considered to make the system more practical. The chaotic properties are analyzed using a bifurcation diagram, Lyapunov exponents, and entropies. In addition, institute of standards and technology tests are conducted to further analyze the randomness of the system signal. Based on the proposed system, a three-dimensional encryption algorithm is designed to encrypt multiple color images with scrambling and diffusion at the bit level. Several analyses, including histogram analysis, information entropy analysis, correlation analysis, key sensitivity, differential attack analysis, and resistance analyses, are performed to test the effectiveness and robustness of the proposed multiple image encryption algorithm with a networked chaotic map model.

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Image Encryption System Based on Joint Transformation Correlation and Ptychography

Cited by 6 publications

References 28 publications

Optical Correlators for Cryptosystems and Image Recognition: A Review

Optical Correlators for Cryptosystems and Image Recognition: A Review

Double Image Encryption System Using a Nonlinear Joint Transform Correlator in the Fourier Domain

Networked Chaotic Map Model and Its Applications in Color Multiple Image Encryption

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