Information security with optical means, such as double random phase encoding, has been
investigated by various researchers. It has been demonstrated that optical technology …

Secure communication is of great importance in the modern world. Many methods,
techniques, and systems are used for secure communication, many of which cannot be used …

Noise is usually undesired yet inevitable in science and engineering. However, by
introducing the engineered noise to the precise solution of Jones matrix elements, we break …

A new multi-image encryption scheme based on quaternion discrete fractional Hartley
transform (QDFrHT) and an improved pixel adaptive diffusion is proposed, which can …

An effective way for broadband holographic multiplexing based on geometric metasurfaces
is demonstrated by the integration of several recording channels into a single device. Each …

We propose an optical multiple-image encryption scheme based on computational ghost
imaging with the position multiplexing. In the encryption process, each plain image is …

A novel image encryption method is proposed by utilizing random phase encoding in the
fractional Fourier domain to encrypt two images into one encrypted image with stationary …

What we believe to be a new technique, based on a modified Gerchberg–Saxton algorithm
(MGSA) and a phase modulation scheme in the Fresnel-transform domain, is proposed to …

We present an image encryption algorithm to simultaneously encrypt two images into a
single one as the amplitudes of fractional Fourier transform with different orders. From the …

We demonstrate in this paper that the traditional double random phase encoding (DRPE)
technique is vulnerable to ciphertext-only attack (COA). In this method, an unauthorized user …