New image group encryption algorithm based on high dimensional hyperchaos system and matrix tensor product
Qingdu Li · Journal of Computer Applications · 2012
Shortcomings of image encryption schemes based on chaos currently can be mainly classified into three types as follows: firstly,low dimensional chaotic sequences cause degradation of chaos;secondly,the structure of chaotic system adopted is too simple;thirdly,the algorithm is merely related to the structure of chaotic system and key.Concerning the shortcomings above,this paper presented a new image group encryption algorithm.In order to overcome the degradation of chaos,the algorithm generated pixel diffusion matrix by coupling chaotic sequences of high dimensional hyperchaos system with chaotic sequences of one dimensional chaotic mapping by means of matrix tensor product.In the process,the generation of pixel diffusion matrix was controlled by plaintext,thus the algorithm was related to plaintext,which enhanced the security of the algorithm.