An Algorithm for Digital Image Scrambling Based on Chaos and Rubik's Cube
Xiaoyi Liu · Zhongguo anquan kexue xuebao · 2008
Current algorithms about digital image scrambling were introduced and analyzed.The merits of the chaotic sequence were introduced in detail.Based on the introduction of the game play of Rubik's cube,it was pointed out that the initial scrambling of Rubik's cube could be taken as an encryption process.Meanwhile,the possibility of applying the encryption principle of Rubik's cube to digital image scrambling was analyzed.Finally,a new algorithm about digital image scrambling,which combined the merits of chaos and Rubik's cube,was designed.This method defined image's rows,columns and diagonal lines as the surfaces of rotation,and the revolving of Rubik's cube as the circulation migration of rotation surfaces.The first step of the new method was to gain the chaotic sequences according to the keys.The second step was to scramble the image through Rubik's cube transform controlled by the chaotic sequences gained in the first step.By contrast with the experimental results of other algorithms,it shows that the algorithm has a better image scrambling effect and could reach the purposes of image scrambling.Analysis shows that the algorithm has lower complexity and higher security and meets the actual needs of application.