Improved diffractive-imaging based image encryption scheme in 3D space

Abstract

In this paper, we present an improved diffractive-imaging-based image encryption scheme in 3D space. In this cryptosystem, the plaintext is divided into several sub-images by binary amplitude masks and then diffused into 3D space at different axial positions for encryption, which confuses the relation between the plaintext and the ciphertext to make the chosen-plaintext attack no longer work. For the decryption, we develop a modified iterative retrieval algorithm to retrieve a decrypted image with high quality. Additionally, this cryptosystem obtains higher security without increasing the amount of the ciphertext. Compared with previous diffractive-imaging-based image encryption schemes, the key space is enlarged so greatly that this cryptosystem can resist the brute force attack. Furthermore, this scheme can significantly reduce the computation and retrieve a decrypted image with high-quality.

Hybrid watermarking and encryption techniques for securing three-dimensional information

“…Since the introduction of dual random phase encoding by Javidi and Refregier in 1995 [1], various encryption and hiding schemes for two-dimensional (2D) images have been proposed. It is well-recognized that threedimensional (3D) objects possess inherently richer data, offering substantial advantages in information storage, transmission and display compared to their two dimensional (2D) counterparts [2,3]. The spatial volumetric structure of 3D objects holds greater perceptual significance by accurately capturing depth, position, and spatial relationships within a scene [4,5].…”

An encrypted hiding scheme for 3D objects based on CGH and Henon mapping

“…In the current CGH-based 3D object encryption technology, the 3D object is coded to generate CGH. Subsequently, the CGH is encrypted using 2D image encryption [18][19][20][21][22][23]. Kong et al [18] combined CGH with chaotic random sequences for hierarchical encryption of 3D objects.…”