In the contemporary landscape, where a huge amount of data plays a vital role, the
importance of strong and robust cybersecurity measures has become increasingly …

Abstract Information security and authentication are important challenges facing society.
Recent attacks by hackers on the databases of large commercial and financial companies …

Most of the existing image encryption techniques bear security risks for taking linear
transform or suffer encryption data expansion for adopting nonlinear transformation directly …

A discussion and a cryptanalysis of the optical phase-truncated Fourier-transform-based
cryptosystem are presented in this paper. The concept of an optical asymmetric …

Based on hyper-chaotic system and discrete fractional random transform, an image
compression-encryption algorithm is designed. The original image is first transformed into a …

A novel asymmetric cryptosystem based on coherent superposition, which is free from
silhouette problem, is proposed. Being different from the phase-truncated Fourier transform …

In this paper, we propose a novel optical asymmetric fingerprint image encryption technique
that uses QR decomposition in gyrator wavelet transform domain. A fingerprint image is …

We propose a novel nonlinear image-encryption scheme based on a Gerchberg–Saxton
(GS) phase-retrieval algorithm in the Fresnel transform domain. The decryption process can …

In this paper, a new multiuser optical image encryption and authentication technique is
proposed. Sparse multiplexing and polar decomposition are used in the Fresnel domain to …

In this paper, we propose a scheme for information security under the basic double random
phase<? A3B2 show [pmg: line-break justify=" yes"/]?> encoding framework but with …