A New Image Encryption Algorithm Based on Improved Logistic Map and Block-Mod Algorithm
The digital image encryption algorithm based on chaotic system has become a hot research topic in the domain of image encryption.This paper proposes an image encryption algorithm based on improved logistic map and Block-Mod algorithm.Firstly,a chaotic sequence is generated by improved logistic map,scrambling the positions of the image pixels in the spatial-domain.Secondly,the pixel values are diffused using two rounds Block-Mod operation.Finally,the pixel position scrambling is performed again,the encrypted image is obtained.Through Matlab simulation experiment,the information entropy of image encryption reached 7.999,the adjacent correlation coefficient of the three directions are within ± 0.1,Experimental results show that the algorithm has a large key space,high key sensitivity,can effectively resist statistical analysis attacks,gray value analysis attacks and other attacks,with good encryption effect.
digital image encryption Logistic map Pixel scrambling Block-Mod algorithm nonlinear mapping
Jingyi Liu Dingding Yang Hongbo Zhou Shiqiang Chen
School of Science,Hubei University for Nationalities,Enshi 445000,Hubei,China School of Mathematics and Information Science,Guiyang University,Guiyang 550005,Guizhou,China
国际会议
重庆
英文
2314-2319
2017-03-25（万方平台首次上网日期，不代表论文的发表时间）