Research on the Security of DICOM Medical Images Based on Improved AES Encryption Algorithm

XIANG Tao; YU Chen-yun; QU Jin-yu; LUO Xiao-song

doi:10.3969/j.issn.0372-2112.2012.02.032

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Research on the Security of DICOM Medical Images Based on Improved AES Encryption Algorithm

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- Research on the Security of DICOM Medical Images Based on Improved AES Encryption Algorithm
- Acta Electronica Sinica Vol. 40, Issue 2, Pages: 406-411(2012)
- 作者机构：
  
  重庆大学计算机学院,重庆,400044
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0372-2112.2012.02.032
  CLC： TP309
- Published：2012
- 稿件说明：
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XIANG Tao, YU Chen-yun, QU Jin-yu, et al. Research on the Security of DICOM Medical Images Based on Improved AES Encryption Algorithm[J]. Acta Electronica Sinica, 2012, 40(2): 406-411.
DOI：

XIANG Tao, YU Chen-yun, QU Jin-yu, et al. Research on the Security of DICOM Medical Images Based on Improved AES Encryption Algorithm[J]. Acta Electronica Sinica, 2012, 40(2): 406-411. DOI： 10.3969/j.issn.0372-2112.2012.02.032.

摘要

本文基于AES算法的设计原理提出了一种改进的医学图像加密算法.针对AES算法结合斜帐篷映射对其进行改进

使其适合DICOM医学图像的数据特点.首先将AES中4*4的分块操作方式变成M*N的全图操作

其次增加了对病人基本信息的保护

最后改进了AES中列混合操作与密钥编排方式.通过理论分析与仿真实验证明改进算法具有较好的置乱效果、扩散性强

并且能够很好地保持DICOM文件格式的兼容性.

Abstract

In this paper

a medical image encryption algorithm is proposed.The algorithm is based on the design principle of AES

and combined with Skew tent map.The standard procedure of AES is modified so that it can be suitable for the DICOM medical digital images.At first

the block size 4*4 in AddRoundKey is replaced by the size of an image.Then the basic information of patient is protected by our proposed algorithm.In addition

the AES's MixColumns and key schedule are improved.The theoretical analysis and numerical simulations show that the improved algorithm not only has better confusion diffusion effects with less computational overhead

but also can maintain the compatibility of DICOM file format.

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