基于超混沌系统的彩色图像加密新算法

为了研究数字图像在通信中的安全传输问题,提出了一种改进的基于超混沌系统的彩色图像加密算法.利用改进的Logistic映射对彩色图像的R、G、B三层像素灰度值进行位置置乱,对置乱后的各层像素灰度值采用陈氏超混沌系统异或加密,得到彩色密文图像.使用MATLAB7.0进行仿真.密文图像杂乱无章,毫无规律,完全不同于原始图像.仿真结果表明,该算法密钥空间大,效率高,安全性能好,适用于彩色图像的安全传输.

A Novel Algorithm for Color Image Encryption Based on Hyper-chaos

In order to study the digital image transmission in communication security issues,a modified color image encryption algorithm based on hyper-chaos system was put forwarded in this letter.It firstly made use of the improvement of the Logistic map to scramble the pixel value of the R,G,B of colored image,then used a hyper-chaotic system to confuse the relationship between the plain-image and the cipher-image.MALAB7.0 is used for simulation.There is no rule among the cipher-text and completely different from the original image.Simulation results indicate that,the suggested encryption algorithm of image has the advantages of large key space and high efficiency and security,and moreover,is suitable for data transmission of color image.