基于耦合的Henon和Sine映射及彩色图像加密

Color Image Encryption Based on Improved Henon and Sine Mapping

针对现有混沌映射模型的混沌空间小及混沌能力弱的问题,通过耦合二维Henon混沌映射模型和Sine混沌映射模型,设计一种新的二维混沌映射模型,通过耦合Sine混沌映射模型和Logistic混沌映射模型,设计一种新的一维混沌映射模型。针对使用单一置乱方法进行图像加密时安全性能不高的问题,通过使用Lorenz映射设计一种随机选择置乱算法的方法。使用设计的两种混沌映射及置乱选择方法,提出一种彩色图像加密方案。仿真实验结果表明:所提方法具有较大的置乱范围、较高的安全性和良好的图像加密效果,对常见的攻击有较强的抵抗力,且易于实现。

Aiming at the problems of small chaotic space and weak chaotic ability of existing chaotic mapping models,a new two-dimensional chaotic mapping model was designed by coupling two-dimensional Henon chaotic mapping model and Sine chaotic mapping model.A new one-dimensional chaotic mapping model was designed by coupling Sine chaotic mapping model and Logistic chaotic mapping model.To solve the problem of low security when using single scrambling method for image encryption,a randomly selected scrambling algorithm was designed by using Lorenz mapping.A color image encryption scheme was proposed using two designed chaotic mapping and scrambling selection methods.The experimental results show that the proposed method has a large scrambling range,high security,good image encryption effect,strong resistance to common attacks,and it is easy to implement.