TD-ERCS chaotic sequences' improvement and color image encryption algorithm
Liao Qi-nan · Journal of Computer Applications · 2011
To improve the performance of Tangent-Delay Ellipse Reflecting Cavity map System(TD-ERCS) and achieve effective protection of color image information,the authors proposed an improved algorithm for the TD-ERCS chaotic sequences and a color image encryption algorithm which was based on this improved sequences.The four-dimensional chaotic real sequences and binary sequences which had ideal random performance were obtained by improving the TD-ERCS.The image,which was composed of the RGB component of the color image,was scrambled by using the improved TD-ERCS chaotic sequences with 8×8 blocks,and then the image was encrypted.The theoretical analysis and experimental results show that the performances of improved TD-ERCS sequences are better than original sequences;the color image encryption algorithm has larger space of key,better encryption effect,higher encryption efficiency,and it also has better security to statistical analysis and stronger ability against JPEG compressing attacks.