Synchronous encryption algorithm for multi-image based on plural model coupled chaotic mask
Zhang Zhi-ga · Jisuanji gongcheng yu sheji · 2015
The current color image encryption algorithms independently encrypt the RGB components,which belong to multichannel encryption mechanism,resulting in big transmission delay.Existing single channel color image encryption algorithms mainly adopt the spectrum cutting technology,which ignores the high frequency component of image and produces the crosstalk effect.To solve these problems,single channel color image synchronous lossless encryption algorithm for RGB components based on plural model coupled chaotic mask was proposed.The DCT transform and ZigZag scanning were introduced to transform RGB components into three matrixes.These matrixes were taken into composite matrix by using the iteration image plural model.The position between real and imaginary parts of plural matrix is permutated using Logistic map.The composite permutation image was formed using the IDCT.The double encrypt function was constructed with chaos phase mask to get the gray cipher.Simulation results show that this encryption algorithm is highly secure.Compared with current algorithms,this algorithm has lossless distortion and its decryption quality is high.