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| 基于混沌和Walsh变换的二值图像加密算法 | |
| 引用本文： | 张亚红,李欣蔚,陈辉.基于混沌和Walsh变换的二值图像加密算法[J].计算机与现代化,2011(3):60-62. |
| 作者姓名： | 张亚红 李欣蔚 陈辉 |
| 作者单位： | 1. 桂林航天工业高等专科学校计算机系,广西,桂林,541004 2. 桂林医学院教务处,广西,桂林,541004 3. 桂林电子科技大学电子工程与自动化学院,广西,桂林,541004 |
| 基金项目： | 桂林航天工业高等专科学校校级课题 |
| 摘 要： | 提出一种基于混沌映射和Walsh变换的二值图像加密算法。首先对二值图像进行混沌加密,再对混沌加密后的图像用Walsh变换进行置乱,实现图像信息的高强度加密。运用Walsh变换可以在很大程度上节约计算时间。仿真实验结果表明,混沌序列与Walsh变换相结合的方法加密强度高,计算时间短。 |
| 关 键 词： | 图像加密 混沌映射 离散Walsh变换 |
Binary Image Encryption Algorithm Based on Chaos and Walsh Transform |
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| ZHANG Ya-hong,LI Xin-wei,CHEN Hui.Binary Image Encryption Algorithm Based on Chaos and Walsh Transform[J].Computer and Modernization,2011(3):60-62. | |
| Authors: | ZHANG Ya-hong LI Xin-wei CHEN Hui |
| Affiliation: | 1.Department of Computer Science and Technology,Guilin College of Aerospace Technology,Guilin 541004,China; 2.Office of Education Administration,Guilin Medical University,Guilin 541004,China; 3.College of Electronic Engineering and Automation,Guilin University of Electronic Technology,Guilin 541004,China) |
| Abstract: | A binary image encryption algorithm based on chaos map and discrete Walsh transform is proposed.Firstly,chaos sequence is used to encrypt the image,then the encryption image is scrambled by the discrete Walsh transform,which can achieve high-strength encryption.The discrete Walsh transform can save computation time greatly.The simulation result shows that this algorithm has high quality of secrecy as well as short computation time. |
| Keywords: | image encryption chaos map discrete Walsh transform |
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