In the modern era, the secure transmission and storage of information are among the utmost
priorities. Optical security protocols have demonstrated significant advantages over digital …

We propose optical image encryption and authentication in the linear canonical transform
(LCT) method by using a sparse representation technique. The linearity in the LCT based …

In this paper, we propose a new multiuser nonlinear optical cryptosystem using fractional-
order vortex speckle (FOVS) patterns as security keys. In conventional optical cryptosystems …

In this paper, a multiuser medical image encryption algorithm is proposed. The proposed
algorithm utilizes polar decomposition, which enables multiuser features in the proposed …

In this paper, we perform a cryptanalysis of a previously published symmetric cryptosystem
that utilizes the Arnold transform (AT), singular value decomposition (SVD), and the …

This paper introduces an asymmetric cryptosystem utilizing Triple Random Phase Encoding
(TRPE), incorporating polar decomposition (PD) and QZ modulation. The utilization of keys …

A two-dimensional Logistic cosine cascade map (2D-LCCM) and a three-dimensional
Logistic cosine cascade map (3D-LCCM) are proposed based on a logistic map and infinite …

In this paper, we have proposed asymmetric image encryption cum authentication
cryptosystem based on double random modulus decomposition using computational ghost …

In this work, we present a new optical double-image encryption method based on a joint
transform correlator (JTC) and the linear canonical domain for the simultaneous …

An optical security method for multiple-image authentication is proposed based on
computational ghost imaging and hybrid non-convex second-order total variation. Firstly …