A flexible and visually meaningful multi-image compression, encryption and hiding scheme based on 2D compressive sensing

• DOI: 10.1016/j.heliyon.2023.e14072
• Publication Date: 2023-02-27T17:06:39Z
• Authors: Dongming Huo; Zhilong Zhu; Xin Zhou; Lisheng Wei; Xing Bai; Yanzhi Bai; Chao Han
• Keywords: Social sciences (General); H1-99; Q1-390; Visually meaningful cipher image; Science (General); 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology; Compressive sensing; Multi-image encryption; Research Article

Background: Encrypting plain images into noise-like cipher is a common method in image encryption. However, when appear public networks, they are more likely to attract attention and suffer cryptanalysis. To solve this problem, researchers propose the concept of visually meaningful encryption scheme, which encrypts image. Objective: In order realize visual security increase information capacity, paper proposes flexible secure multi-image compression, hiding scheme based on two-dimensional compressive sensing (2DCS), can flexibly complete compression multiple without increasing amount ciphertext data. Methods: The divided process embedding process. process, randomly scrambled non-linear gray value transformed obtain pre-encrypted integer matrix, then 2DCS used compress matrix get secret Repeat for images. wavelet transform bit-plane decomposition embed quantized coefficient host modified inverse spatial space Result: simulation experiment verifies feasibility effectiveness users choose improve system's capacity or image's according their own needs.