New image group encryption algorithm based on high-dimension chaotic system
HE Jian-nong · Jisuanji gongcheng yu sheji · 2010
A new more general image encrypts algorithm is proposed.The chaotic sequences generated by high-dimensional Lorenz chaotic system are pre-processed to become pseudo-random sequences with self-correlation of a function and cross-correlation approximately zero.Then the sequences is adopted as a key stream to randomize the rows and columns of the image matrix with the key value.Finally,the pixel values of the image as a plain text sequence are further randomized by group encryption algorithm and the completely encrypted image is achieved.The new algorithm can encrypt binary images,8-bit grayscale images,24-bit true color images,and remote sensing images with larger amounts of data.The simulation results show that the new algorithm has many good features including high speed,strong anti-attack capability,security and universality.