Study on Image Scrambling Algorithm of Double Combination Based on Chaos
Hongmei Tang · Video Engineering · 2011
To solve the problem that the image scrambling algorithm have limitations in terms of encryption strength and generalization,a scrambling algorithm of double combination has been proposed.The algorithm takes advantage of chaotic maps which have the characteristics of disorder,random,and sensitivity to the initial variables.The logistic chaotic map has been applies on sequence cross principle cleverly.The algorithm solve the limitation that direct-sequence cross algorithm is only applicable to the image with even elements,and improve the accuracy of a single key to magnitude of 10-9.Moreover,the experimental results show that the pixel correlation of the image which have been scrambled by the double combination algorithm is smaller than the image that scrambled by sequence cross algorithm.