A chaotic hierarchical encryption/watermark embedding scheme for multi-medical images based on row-column confusion and closed-loop bi-directional diffusion  

作　　者：张哲祎 牟俊 Santo Banerjee 曹颖鸿 Zheyi Zhang;Jun Mou;Santo Banerjee;Yinghong Cao(School of Information Science and Engineering,Dalian Polytechnic University,Dalian 116034,China;Department of Mathematical Sciences,Politecnico di Torino,Torino 10129,Italy)

机构地区：[1]School of Information Science and Engineering,Dalian Polytechnic University,Dalian 116034,China [2]Department of Mathematical Sciences,Politecnico di Torino,Torino 10129,Italy

出　　处：《Chinese Physics B》2024年第2期228-237,共10页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.62061014);the Natural Science Foundation of Liaoning province of China(Grant No.2020-MS-274).

摘　　要：Security during remote transmission has been an important concern for researchers in recent years.In this paper,a hierarchical encryption multi-image encryption scheme for people with different security levels is designed,and a multiimage encryption(MIE)algorithm with row and column confusion and closed-loop bi-directional diffusion is adopted in the paper.While ensuring secure communication of medical image information,people with different security levels have different levels of decryption keys,and differentiated visual effects can be obtained by using the strong sensitivity of chaotic keys.The highest security level can obtain decrypted images without watermarks,and at the same time,patient information and copyright attribution can be verified by obtaining watermark images.The experimental results show that the scheme is sufficiently secure as an MIE scheme with visualized differences and the encryption and decryption efficiency is significantly improved compared to other works.

关 键 词：chaotic hierarchical encryption multi-medical image encryption differentiated visual effects row-column confusion closed-loop bi-directional diffusion transform domain watermark embedding 

分 类 号：R318[医药卫生—生物医学工程] TP309.7[医药卫生—基础医学]