ALCencryption:A Secure and Efficient Algorithm for Medical Image Encryption  

作　　者：Jiao Ge 

机构地区：[1]College of Computer Science and Technology,Hengyang Normal University,Hengyang,421002,China [2]Hunan Provincial Key Laboratory of Intelligent Information Processing and Application,Hengyang,421002,China

出　　处：《Computer Modeling in Engineering & Sciences》2020年第12期1083-1100,共18页工程与科学中的计算机建模（英文）

基　　金：This work is partly supported by the Scientific Research Fund of Hunan Provincial Education Department(19B082);the Science and Technology Development Center of the Ministry of Education-New Generation Information Technology Innovation Project(2018A02020);the research supported by Science Foundation of Hengyang Normal University(19QD12);the Science and Technology Innovation Program of Hunan Province(2016TP1020);the Application-oriented Special Disciplines,Double First-Class University Project of Hunan Province(Xiangjiaotong[2018]469);the Hunan Province Special Funds of Central Government for Guiding Local Science and Technology Development(2018CT5001);the Subject Group Construction Project of Hengyang Normal University(18XKQ02).

摘　　要：With the rapid development of medical informatization and the popularization of digital imaging equipment,DICOM images contain the personal privacy of patients,and there are security risks in the process of storage and transmission,so it needs to be encrypted.In order to solve the security problem of medical images on mobile devices,a safe and efficient medical image encryption algorithm called ALCencryption is designed.The algorithm first analyzes the medical image and distinguishes the color image from the gray image.For gray images,the improved Arnold map is used to scramble them according to the optimal number of iterations,and then the diffusion is realized by the Logistic and Chebyshev map cross-diffusion algorithm.The color image is encrypted by cross-diffusion algorithm of double chaotic map.Security and efficiency analysis show that the ALCencryption algorithm has the characteristics of small neighboring pixels,large key space,strong key sensitivity,high safety and short encryption time.It is suitable for medical image encryption of mobile devices with high real-time requirements.

关 键 词：Patient privacy DICOM medical image encryption scrambling degree CROSS-DIFFUSION 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]