An Image Encryption Algorithm Based on Cross Chaotic Sequences
Qiang Zhao · Computer Technology and Development · 2012
The current chaotic encryption algorithm is based on single level chaotic system or chaotic encryption technique of low dimension,and the key space of these chaotic mapping is small which is decoded simply,they also not have strict privacy of cryptography sense.Propose one kind of algorithm based on the Logistic mapping and Chebyshev mapping as two chaotic generators,in the cross chaotic image encryption algorithm,not only make gray scrambling according to the encryption matrix for image pixel,but also through discrete mapping generates the corresponding symbol matrix and a permutation matrix.The experimental results show that the algorithm is simple,has a small amount of calculation and image.Decryption of the initial value of the chaos sequence has a strong dependence and high security.It also proves that the image scrambling degree can well reflect the visual difference and encryption effect before and after image encryption.