A novel nonlinear encryption–decryption system based on a joint transform correlator (JTC)
and the Gyrator transform (GT) for the simultaneous encryption and decryption of multiple …

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 …

The Collins diffraction transform (CDT) describes the optical wave diffraction from the
generic paraxial optical system. The CDT has as special cases the diffraction domains given …

A well-known technique for optical image encryption is the double random phase encoding
(DRPE) technique, which uses two random phase masks (RPMs), one RPM at the input …

We propose the use of the Jigsaw transform (JT) and the iterative cosine transform over a
finite field in order to encrypt and decrypt images. The JT is a nonlinear operation that allows …

We propose a new encryption system based on a nonlinear joint transform correlator (JTC)
using the information of two biometrics (one digital fingerprint for each user) as security keys …

The Fresnel transform (FrT) is commonly used to describe the free-space propagation of
optical waves. In this work, we present new definitions for the convolution, correlation and …

The gyrator transform (GT) is used for images processing in applications of light
propagation. We propose new image processing operators based on the GT, these …

We propose the use of the Jigsaw transform (JT) and the iterative cosine transform over a
finite field in order to encrypt and decrypt images. The JT is a nonlinear operation that allows …