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 …

A lensless optical security system based on double random-phase encoding in the Fresnel
domain is proposed. This technique can encrypt a primary image to random noise by use of …

We proposed a novel architecture for optical image encryption based on interference. The
encryption algorithm for this new method is quite simple and does not need iterative …

We introduce the technique of wavelength multiplexing into a double random-phase
encoding system to achieve multiple-image encryption. Each primary image is first …

We propose a new method for image encryption using fractional Fourier transform and
chaos theory. Random phase masks are generated using iterative chaos functions. The …

In a double random-phase encoding system operating in the Fresnel domain, the recovered
image would become meaningless noise when the random phase masks shifted sufficiently …

Interference-based optical encryption schemes have an inherent silhouette problem due to
the equipollent nature of the phase-only masks (POMs) generated using an analytical …

We propose a new method for image encryption, using gyrator transform and chaos theory.
Random phase masks are generated using chaos functions and are called as chaotic …

A novel method for encoding color information based on a double random phase mask and
a double structured phase mask in a gyrator transform domain is proposed. The amplitude …

In this paper, we propose a new method for securing color information based on Arnold
transform in gyrator transform domain. A color image is first separated into red, green and …