文档介绍：石家庄铁道大学四方学院毕业设计
图像加密技术在远程医疗诊断系统中的应用研究
Research of Image Encryption Technology
in Remote Medical Diagnosis System
2011 届电气工程系
专业电子信息工程
学号 20076130
学生姓名宋晓芳
指导教师郑伟
完成日期 2011年 5 月 25 日
摘要
随着计算机网络的发展,远程医疗技术进入迅猛发展时期。由于涉及个人隐私问题,因此在医学图像进行传输之前必须进行加密处理。
本文针对远程医疗诊断系统中图像传输的特点,提出了两种适合在远程医疗诊断系统中应用的图像加密技术。首先在研究经典的Arnold图像加密技术的基础上,提出了一种改进后的Arnold加密算法,通过引入随机序列,增加了密钥对算法的控制,同时将图像进行整体与分块的加密处理,使得图像的置乱效果大大提高,满足了安全性的要求。然后提出了一种基于混沌的图像加密技术,应用Logistic映射系统构造了混沌序列,将得到的混沌序列再与图像序列进行异或运算,从而实现了对图像的加密。结果表明,本文提出的这两种图像加密技术适合在远程医疗诊断系统中应用,具有安全性高,加密解密速度快,算法容易实现等优点。
关键词:远程医疗图像加密 Arnold算法混沌加密算法
Abstract
With the development work, remote medical technology enters into a rapid development period. Due to privacy issues, we need to make medical image encrypted before transmission .
Aiming at the characteristics of the image transmission in remote medical diagnostic system , this paper puts forward two kinds of image encryption technologies which are fit for the application of remote medical diagnosis system. First, based on the research of classic Arnold image encryption technology, an improved Arnold encryption algorithm was presented. Through introducing the random sequence, we increases the key to control algorithm, and the encryption processing of overall image with blocks makes the image scrambling effect greatly improved. Therefore the algorithm can meet the safety requirements. Then this paper proposes the other image encryption technology based on chaotic. With the application of Logistic mapping system, we will get a chaotic sequences with exclusive or operation of image sequences and chaotic sequences, the operation can fulfill the image encryption. The results show that the two kinds of proposed image encryption technology are suitable for the application of long-distance medical diagnosis system, and have advantages of high safety, , fast speed in encrypt and decrypt, easily realizable algorithm.
Key words: Remote medical Image encryption Arnold algorithm
Chaotic encryption al