赵云楠,
李雅宁,
孔思晓
南京信息工程大学电子与信息工程学院 南京 210044
基金项目:国家自然科学基金 (61871230)，江苏省自然科学基金 (BK20181410)
详细信息
作者简介:李春彪：男，1971年生，教授，研究方向为非线性电路与系统及其应用
孔思晓：男，1996年生，硕士生，研究方向为电子与通信工程
通讯作者:李春彪 goontry@126.com; chunbiaolee@nuist.edu.cn
中图分类号:TN911.73; TN918.4计量
文章访问数:114
HTML全文浏览量:59
PDF下载量:29
被引次数:0
出版历程
收稿日期:2020-07-13
修回日期:2021-03-28
网络出版日期:2021-06-02
刊出日期:2021-12-21
An Image Encryption Algorithm Based on Logistic Chaotic Mapping with Sinusoidal Feedback and Its FPGA Implementation
Chunbiao LI,,Yunnan ZHAO,
Yaning LI,
Sixiao KONG
School of Electronic & Information Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
Funds:The National Natural Science Foundation of China (61871230), The Nature Science Foundation of Jiangsu Province (BK20181410)
摘要
摘要:基于混沌的数字图像加密算法因具有较大的密钥空间和较高的密钥敏感特性等而被广泛地应用。该文在经典Logistic映射中引入正弦反馈，构成新的映射关系，并分析该映射的混沌行为。利用混沌映射导出离散混沌加密序列，并对加密序列进行放大取整，增强其伪随机性；利用NIST随机性测试方法测试了加密序列的伪随机性；将伪随机序列与原始图像进行异或运算，实现图像加密。数值仿真结果表明所提加密算法具有较好的加密效果，其密钥也具有较好的敏感性和伪随机性，最后基于FPGA平台的硬件加密实现了本算法。
关键词:图像加密/
Logistic混沌映射/
正弦反馈/
FPGA/
NIST
Abstract:Digital image encryption algorithm based on chaos is widely used because of its large key space and high key sensitivity. The sinusoidal feedback is introduced into the classical Logistic mapping to form a new discrete mapping, and the chaotic behavior of the mapping is analyzed. The chaotic mapping is used to derive the discrete chaotic encryption sequence, and the encryption sequence is enlarged and rounded to enhance its pseudo-randomness. The pseudo-randomness of encrypted sequences is tested by NIST (National Institute of Standards and Technology) test method. The pseudo-random sequence is XOR (Exclusive OR) with the original image to realize image encryption. Numerical simulation results show that the new encryption algorithm has better encryption effect, and its key shows better sensitivity and pseudo-randomness. Finally, hardware encryption for this algorithm is realized based on FPGA (Field Programmable Gate Array) platform.
Key words:Image encryption/
Logistic chaotic map/
Sinusoidal feedback/
Field Programmable Gate Array (FPGA)/
National Institute of Standards and Technology (NIST)
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