A new color image encryption algorithm based on dual scrambling about pixel position scrambling and RGB intensity value
HE Bing
WANG Ju-xia
SU Bian-ling
Abstract：In order to improve the deficiencies of the existing scrambling algorithm effectively,a new image encryption algorithm based on dual scrambling about pixel position scrambling and RGB color space inten-sity value was proposed.Firstly,the rows and columns of 2D matrix would be mapped into 1 D vector by making use of new proposed scrambling method based on pixel position.Then a set of pseudo sequence was generated by using the Logistic mapping,and it was ranked from small to large.The position that corre-sponding to each element was recorded by group sequence,which was called key stream.Finally,the corre-sponding pixel position of 1 D vector was scrambled by index value which was formed by key stream.The encrypted image was obtained by 1 D vector rearranged into a new 2D matrix.The experimental results showed that the proposed method had a large key space,and the scrambled image had a histogram distribu-tion of white noise.The correlation of image pixel values was smaller.It greatly improved the ability to resist the illegal attack and increased the safety of encrypted image.
Keywords：color image encryption algorithmpixel position scramblingRGB intensity value scrambling
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 61-66 )