Nowadays, security in data transfer is of special importance. Images are of the most
attractive kinds of data in the encryption domain. Color images are more attractive than the …

In this paper we review a number of optical image encryption techniques proposed in the
literature inspired by the architecture of the classic optical Double Random Phase Encoding …

In this paper, we propose a new method for optical image encryption using fractional Fourier
transform, DNA sequence operation and chaos theory. Random phase masks are generated …

A novel color image encryption scheme is presented by combining the multi-parameter
fractional discrete Tchebyshev moments (MPFrDTMs) with the nonlinear fractal permutation …

We propose a novel opto-digital method of color image encryption which utilizes compound
chaotic mappings, the reality preserving fractional Hartley transformation and piecewise …

We propose a method for fully phase image encryption based on double random-structured
phase mask encoding in the gyrator transform (GT) domain. The security of the system is …

A color image encryption algorithm is designed by using the affine transform in the gyrator
transform domains. The RGB components of the color image are converted into the real part …

This paper presents, a new image encryption technique using Multiresolution Singular
Value Decomposition (MSVD), Discrete Wavelet Transform (DWT) and Arnold transform in …

We propose a watermarking scheme for phase images, based on the use of devil's vortex
Fresnel lens (DVFL) as a phase mask. The DVFL provides much-desired parameter-rich …

The aim of this study is watermarking image encryption based on the fractional Mellin
transform (FrMT) and singular value decomposition (SVD) using deterministic phase masks …