基于改进一维逻辑正弦混沌映射系统的图像加密算法  

Image Encryption Algorithm Based on Improved One-dimensional Logistic-Sine Chaotic Mapping System

作　　者：邹东尧 李明 李军 李志刚 ZOU Dong-yao;LI Ming;LI Jun;LI Zhi-gang(College of Computer and Communication Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000, China;Henan Co., Ltd., Network Department, China Mobile Communications Group, Zhengzhou 450000, China)

机构地区：[1]郑州轻工业大学计算机与通信工程学院,郑州450000 [2]中国移动通信集团河南有限公司网络部,郑州450000

出　　处：《科学技术与工程》2021年第28期12175-12184,共10页Science Technology and Engineering

基　　金：河南省科技攻关项目(212102210407,192102210133);河南省重点研发与推广专项(212102210425,202102210182)。

摘　　要：针对一维混沌映射Logistic映射和Sine映射参数范围有限且混沌序列分布不均匀等问题,提出了一种改进的一维逻辑正弦混沌系统,并在此基础上提出了一种对明文敏感度较高的图像加密算法。首先,结合一维混沌映射Logistic映射和Sine映射形成一种改进一维逻辑正弦混沌系统(one-dimensional Logistic-Sine chaotic system,1-LSCMS)。其次,利用该系统生成的较为复杂的混沌序列对图像像素的位置及大小进行置换。最后,对置换后的图像进行扩散。实验结果表明:所提算法具有较好的加密效果,密钥空间大且敏感性较强,可以应用到图像加密安全领域。Aiming at the problems of one-dimensional chaotic mapping Logistic mapping and Sine mapping with limited parameter ranges and uneven distribution of chaotic sequences,an improved one-dimensional Logistic-Sine chaotic system was proposed,and on this basis,an image encryption algorithm with high sensitivity to plaintext was proposed.Firstly,combine one-dimensional chaotic mapping Logistic mapping and Sine mapping to form an improved one-dimensional Logistic-Sine chaotic system(1-LSCMS).Secondly,the position and size of the image pixels were replaced by the more complicated chaotic sequence generated by the system.Finally,the image after replacement was diffused.Experimental results show that the proposed algorithm has a good encryption effect,large key space and strong sensitivity,and can be applied to the field of image encryption security.

关 键 词：混沌系统 置乱 扩散 敏感性 加密算法 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]