A Multi-Image Encryption with Super-Lager-Capacity Based on Spherical Diffraction and Filtering Diffusion

Abstract

A multi-image encryption with super-large-capacity is proposed by using spherical diffraction and filtering diffusion. In the proposed method, initial images are processed sequentially by filtering diffusion and chaos scrambling. The images are combined into one image using XOR operation. The combined image is encrypted by improved equal modulus decomposition after spherical diffraction. There are three main contributions of the proposed method—(1) resisting phase-retrieval attack due to the asymmetry of spherical diffraction; (2) high flexibility of decrypting images individually; and (3) super-large encryption capacity of the product of image resolution and grayscale level, which is the most significant advantage. The feasibility and effectiveness of the proposed encryption are verified by numerical simulation results.

Multi-Image Encryption Based on Compressed Sensing and Deep Learning in Optical Gyrator Domain

“…Subsequently, Wang et al proposed a multi-image asymmetric encryption method in the Fourier domain [14], which achieved multi-image encryption by combining the amplitudes and phases of different images in sequence. Moreover, multi-image encryption techniques based on fractional Merlin transform [15], ghost imaging technique [16], spherical diffraction transform [17], and optical gyrator transform [18] have been proposed respectively.…”

SecureVision: An Open-Source User-Customizable Image Encryption Program

“…The authors demonstrated an assuring security performance of their proposed method that could enhance the digital image security. Apart from these studies, various other methods were proposed, and interested readers are referred to References [25][26][27] and references therein for more information. Many conventional encryption techniques such as the AES algorithm are very useful.…”