基于Henon映射置换的彩色图像加密算法

Color image encryption algorithm based on Henon mapping permutation

近年来,基于混沌理论的彩色图像加密算法被用来提高彩色图像的安全性,因其生成随机混沌序列的复杂度低、密钥空间较小、抵抗噪声攻击、闭塞攻击等能力较弱、效率低等缺点。本文提出了一种基于Henon映射置换的彩色图像加密新算法。从Henon混沌映射生成三个伪随机序列,根据原始彩色图像的R、G、B三个通道的特征得到初始值。同时,产生三个序列的每个值都被转换用来控制每个旋转和循环移位的程度。彩色图像的每个像素平面可以平行执行,但是彼此交互。通过实验仿真和安全性测试,验证了该算法的性能和安全性,达到了预期结果。

In recent years,the security of color images is improved by color image encryption algorithms based on chaos theory.However,existing encryption algorithms still have the disadvantages of low complexity in generating random chaotic sequences,small key space,and weak ability to resist noise attacks,occlusion attacks,and low efficiency.This paper proposes a color image encryption algorithm based on Henon mapping permutation.Three pseudo-random sequences are first generated from the Henon chaotic map,and the initial values are obtained based on the characteristics of the R,G,and B channels of the original color image.At the same time,each value that produces three sequences is transformed to control the degree of each rotation and cyclic shift.Each pixel plane of a color image may be executed in parallel,but interacting with each other.Through experimental simulation and security testing,the performance and security of the algorithm were verified,and the results were achieved.