基于Logistic混沌的图像实值加密

洪媛; 徐宁; 涂兴华

doi:doi:10.3969/j.issn.1007-5461. 2018.02.004

量子电子学报, 2018, 35 (2): 149, 网络出版: 2018-04-23

基于Logistic混沌的图像实值加密

Image real-value encryption based on Logistic chaos

论文大纲

洪媛 ^*徐宁涂兴华

作者单位

南京邮电大学光电工程学院, 江苏南京 210046

图像处理实值编码 Logistic混沌图像加密信息传输 image processing real-value encoding Logistic chaos image encryption information transmission

摘要

提出了一种基于Logistic混沌的图像实值加密算法,在保证信息安全的同时极大简化了加密信息的传输。该算法利用Logistic混沌控制生成相位模板,基于混沌系统的非线性、初始值敏感性,在减小密钥体积的同时增大了密钥空间,增加了系统复杂性。在保证原始信息可还原的前提下,将实值加密矩阵保存为低失真灰度图格式,便于在用户间传输加密信息。对该算法进行MATLAB仿真分析, 结果表明提出算法具有良好的抗噪声、抗剪切稳健性；密钥具有高敏感性,可有效抵御穷举攻击。

Abstract

An image real-value encryption algorithm based on Logistic chaos is proposed. The transmission of encrypted information is greatly simplified while ensuring the information security. The algorithm uses Logistic chaos control to generate phase template. Based on the nonlinearity and sensitivity to initial values of the chaotic system, the key space is increased while the key volume is reduced, and system complexity is increased. In the premise of original information being restored, the obtained real-value encryption matrix is saved as low-distortion gray-scale image, which facilitates the transmission of encrypted information conveniently among users. The algorithm is simulated with MATLAB, and results show that the proposed algorithm has good robustness against noise and shear. The keys are characterized by high sensitivity, which provides strong resistance for exhaustive attack.

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洪媛, 徐宁, 涂兴华. 基于Logistic混沌的图像实值加密[J]. 量子电子学报, 2018, 35(2): 149. HONG Yuan, XU Ning, TU Xinghua. Image real-value encryption based on Logistic chaos[J]. Chinese Journal of Quantum Electronics, 2018, 35(2): 149.

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