We propose a new technique to encrypt an image for secure image transmission. The digital
signature of the original image is added to the encoded version of the original image. The …

We implement a fully phase encryption system, using fractional Fourier transform to encrypt
and decrypt a 2-D phase image obtained from an amplitude image. The encrypted image is …

We present a system for the implementation of phase-only optical decryption of an encrypted
fixed phase mask. We achieve decryption by superimposing a decrypting phase key …

This paper describes a novel method of incorporating concealed coding features in security
holograms in the form of moiré patterns, which need an encoded key hologram to decode …

In this paper, we implement a fully phase-encrypted memory system using cascaded
extended fractional Fourier transform (FRT). We encrypt and decrypt a two-dimensional …

Optical information processing techniques offer many advantages for data security
applications. Optics offers many degrees of freedom like phase, spatial frequency, and …

A technique based on optical operations for image encryption and decryption is presented
by simulation and experimentally. In this method, an image is encrypted by a fringe pattern …

This paper presents a new method for a visual cryptography scheme that uses phase masks
and an interferometer. To encrypt a binary image, we divided it into an arbitrary number of …

A new phase-to-amplitude data page conversion method is proposed for efficient recovery of
the data encoded in phase-modulated data pages used in holographic storage and optical …

The performance of a fully phase-based encryption system is analyzed. The encryption is
done using a double random fractional Fourier domain random phase encoding technique …