基于像素值二次置换的快速医学图像加密算法研究  

Research on fast medical image encryption algorithm based on pixel value secondary permutation

作　　者：贾志刚 葛晓伟 杨扬[1] 李育申 李郁鸿[1] JIA Zhigang;GE Xiaowei;YANG Yang;LI Yushen;LI Yuhong(Information Department,the First Affiliated Hospital of Zhengzhou University,Zhengzhou 450052,Henan Province,China)

机构地区：[1]郑州大学第一附属医院信息处,郑州450052

出　　处：《中国数字医学》2025年第4期72-77,共6页China Digital Medicine

基　　金：2022年度河南省医学科技攻关计划软科学重点项目(RKX202201007)。

摘　　要：目的:提高多学科会诊模式下医学图像传输安全性和加密效率,提出一种快速医学图像加密算法。方法:该加密算法采用交叉置乱方法对图像像素位置置乱,利用原图像哈希值计算混沌映射的初始值,在计算一次混沌序列的情况下,完成两次像素值置换和扩散。结果:实验结果显示,各项安全性指标均达到预期效果,脑部图像、腰椎图像和胸部图像的加密时间分别为155.6 ms、155.8 ms、156.1 ms,解密时间分别为52.3 ms、56.8 ms、64.4 ms。结论:该加密算法的安全性高,运算速度快,提升了MDT诊疗模式下医学图像传输的安全和效率,从技术层面促进了MDT诊疗模式的发展。Objective To improve the security and encryption efficiency of medical image transmission in multidisciplinary treatment mode,a fast medical image encryption algorithm is proposed.Methods The encryption algorithm uses the cross scrambling method to displace the pixel positions of the image,calculates the initial value of the chaotic map using the original image hash value,and performs two pixel value permutation and diffusion in case of calculating the chaotic sequence once.Results The experimental results showed that all the security indicators achieved the expected effect.The encryption time for brain image,lumbar image,and chest image was 155.6 ms,155.8 ms and 156.1 ms,respectively.The decryption time is 52.3 ms,56.8 ms,and 64.4 ms,respectively.Conclusion The encryption algorithm has high security and fast operation speed,which can improve the safety and efficiency of medical image transmission in MDT diagnosis and treatment mode,and promote the development of MDT diagnosis and treatment mode from a technical perspective.

关 键 词：多学科会诊 医学图像 加密 像素置换 混沌映射 

分 类 号：R319[医药卫生—基础医学] TP399[自动化与计算机技术—计算机应用技术]