This paper proposes a new encryption and decryption method for optical and digital double
color-images using 2D-multiple parameter fractional discrete cosine transform (MPFrDCT) …

We propose an asymmetric optical image cryptosystem based on biometric keys and
singular value decomposition (SVD) in the Fresnel transform domain. In the proposed …

An asymmetric optical cryptosystem to encrypt images using devil's vortex Fresnel lens
(DVFLs) phase masks and lower upper decomposition with partial pivoting (LUDPP) is …

Abstract Confidentiality, integrity, authenticity, non-repudiation and storing and transmitting
images over the unsecured channel has become a challenging task nowadays. In this …

For any optical encryption and decryption systems, security is the major concern. In this
paper, security of time varying nonlinear term embedded double random phase encoding …

Chaotic structured phase masks (CSPM), equal modulus decomposition (EMD) and
fractional Fourier transform are potentially proposed to design the effective symmetric …

A new asymmetric optical double image encryption algorithm is proposed, which combines
phase truncation and singular value decomposition. The plain text is encrypted with two …

A novel image authentication scheme based on two level phase retrieval algorithm (PRA)
propagated in fractional Hartley transform (FrHT) to extract two phase-only masks (POMs) is …

An asymmetric image encryption scheme has been proposed in the fractional Fourier
transform (FRT) domain, using a radial Hilbert mask in the input plane and a random phase …

Background: A spiral phase rear mounted masked scheme is proposed based on Gyrator
Transform (GT) to enhance the security contribution of second lens of the existing Double …