Optical Image Encryption System Using Several Tilted Planes

O., Juan M. Vilardy; Jimenez, Chloé; M., Cesar O. Torres

doi:10.3390/photonics6040116

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…In addition, optical technology is favored by many experts and scholars because of its high transmission speed, large storage capacity, and high parallelism. Thus, many optical image encryption algorithms [21][22][23] have been presented. Although the use of optical technology can effectively resist illegal attacks, the use of optical technology to encrypt images is prone to noise and requires higher equipment, resulting in poor practicability.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric image encryption algorithm based on a new three-dimensional improved logistic chaotic map

Ye¹,

Wu²,

Huang³

et al. 2023

Chinese Phys. B

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Based on some analyses of existing chaotic image encryption frameworks and a new designed 3D-ILM chaotic map, an asymmetric image encryption algorithm using public-key RSA is presented in this paper. In the first stage, a new 3D-ILM chaotic map is proposed to enhance the chaotic behavior considering analysis of time sequence, Lyapunov exponent and Shannon entropy. In the second stage, combined with the public key RSA algorithm, a new key acquisition mathematical model (MKA) is constructed to obtain the initial keys for the 3D-ILM. Consequently, the keystream can be produced depending on the plain image for a higher security. Moreover, a novel process model (NPM) for the input of the 3D-ILM is built, which is built to improve the distribution uniformity of the chaotic sequence. In the third stage, to encrypt the plain image, a pre-process by XOR operation with a random matrix is applied. Then, the pre-processed image is performed by a permutation for rows, a downward modulo function for adjacent pixels, a permutation for columns, a forward direction XOR addition-modulo diffusion, and a backward direction XOR addition-modulo diffusion to achieve the final cipher image. Moreover, experiments show that the the proposed algorithm has a better performance. Especially, the number of pixels change rate (NPCR) is near to ideal case 99.6094%, with the unified average changing intensity (UACI) near to 33.4634% and the information entropy (IE) near to 8.

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Section: Introductionmentioning

confidence: 99%

Asymmetric image encryption algorithm based on a new three-dimensional improved logistic chaotic map

Ye¹,

Wu²,

Huang³

et al. 2023

Chinese Phys. B

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“…However, they cannot obtain phase distribution, which is more important in the imaging of some transparent samples. To address this problem, the phase retrieval algorithm was proposed [1][2][3]. This is a type of technique to reconstruct the wavefront without interferometric measurement.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Multi-Distance Phase Retrieval via Unequal Interval Measurements

Yuan

Cao

et al. 2021

Photonics

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In the conventional methods of multi-distance phase retrieval, the diffraction intensity patterns are recorded at equal intervals, which can induce slow convergence or stagnation in the subsequent reconstruction process. To solve this problem, a measurement method with unequal intervals is proposed in this paper. The interval spacings between adjacent measurement planes are decreased gradually. A large gap accelerates retrieval progress, and a short span helps to recover detailed information. The proposed approach makes full use of the available measured dataset and simultaneously generates variations in diversity amplitude, which is a crucial issue for the techniques of multi-image phase retrieval. Both computational simulations and experiments are performed. The results demonstrate that this method can improve the convergence speed by 2 to 3 times and enhance the quality of reconstruction results in comparison to that of the conventional methods.

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“…The scale of output field can be adjusted as well. Recently, Vilardy et al proposed an image encryption method which uses tilted planes in the Fourier and output planes in the double random phase encoding technique [26]. The angles of two tilted planes can serve as the additional security keys.…”

Section: Introductionmentioning

confidence: 99%

Angle Multiplexing Optical Image Encryption in the Fresnel Transform Domain Using Phase-Only Computer-Generated Hologram

2019

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We propose an angle multiplexing method for optics-based image encryption using a phase-only computer-generated hologram (POCGH) in the tilted Fresnel transform (TFrT) domain. Modified Gerchberg-Saxton algorithms, based on the three types of rotation manipulation in both the hologram and reconstruction planes, are used with their corresponding TFrT parameters to extract the phase-only functions (POFs) of the target images. All the extracted POFs are then phase-modulated and summed to obtain the final POCGH, which is capable of multiplexing and avoiding overlap in the reconstructed images. The computer simulation results show that the images corresponding to the various rotation manipulations at the hologram and image reconstruction planes can be successfully restored with high correlation coefficients. Due to the encrypted nature of the multiplexed images, a higher system security level can be achieved, as the images can only be correctly displayed when all the required parameters in the TFrT are available. The angle sensitivity on the image quality for each manipulation is also investigated.

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Optical Image Encryption System Using Several Tilted Planes

Cited by 6 publications

References 9 publications

Asymmetric image encryption algorithm based on a new three-dimensional improved logistic chaotic map

Asymmetric image encryption algorithm based on a new three-dimensional improved logistic chaotic map

Enhancing Multi-Distance Phase Retrieval via Unequal Interval Measurements

Angle Multiplexing Optical Image Encryption in the Fresnel Transform Domain Using Phase-Only Computer-Generated Hologram

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