A novel approach to visual image encryption:2D hyperchaos,variable Josephus,and 3D diffusion  

作　　者：Yan Hong Xinyan Duan Jingming Su Zhaopan Wang Shihui Fang 洪炎;段心妍;苏静明;王昭盼;方士辉

机构地区：[1]School of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan 232001,China

出　　处：《Chinese Physics B》2025年第4期335-352,共18页中国物理B(英文版)

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.62105004 and 52174141);the College Student Innovation and Entrepreneurship Fund Project(Grant No.202210361053);Anhui Mining Machinery and Electrical Equipment Coordination Innovation Center,Anhui University of Science&Technology(Grant No.KSJD202304);the Anhui Province Digital Agricultural Engineering Technology Research Center Open Project(Grant No.AHSZNYGC-ZXKF021);the Talent Recruitment Special Fund of Anhui University of Science and Technology(Grant No.2024yjrc175);the Graduate Innovation Fund Project of Anhui University of Science and Technology(Grant Nos.2024cx2067,2024cx2107,and 2024cx2064);Seed Support Project for Postgraduate Innovation,Entrepreneurship and Practice at Anhui University of Science and Technology(Grant No.2024cxcysj084).

摘　　要：With the development of the Internet,image encryption technology has become critical for network security.Traditional methods often suffer from issues such as insufficient chaos,low randomness in key generation,and poor encryption efficiency.To enhance performance,this paper proposes a new encryption algorithm designed to optimize parallel processing and adapt to images of varying sizes and colors.The method begins by using SHA-384 to extract the hash value of the plaintext image,which is then processed to determine the chaotic system’s initial value and block size.The image is padded and divided into blocks for further processing.A novel two-dimensional infinite collapses hyperchaotic map(2DICHM)is employed to generate the intra-block scrambling sequence,while an improved variable Joseph traversal sequence is used for inter-block scrambling.After removing the padding,3D forward and backward shift diffusions,controlled by the 2D-ICHM sequences,are applied to the scrambled image,producing the ciphertext.Simulation results demonstrate that the proposed algorithm outperforms others in terms of entropy,anti-noise resilience,correlation coefficient,robustness,and encryption efficiency.

关 键 词：SHA-384 two-dimensional infinite collapses hyperchaotic map(2D-ICHM) variable Joseph traversal 3D forward shift diffusion 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]