In order to protect the information of images effectively
a novel image encryption scheme based on Logistic map and hyper-chaos system is proposed in this paper.The encryption system employs the chaotic sequence of Logistic map combining hyper-chaos to scramble the pixel matrix and make gray-level transformation.Simulation experiment and security analysis show that the suggested algorithm is of high security
a large key space
and relatively high sensitivity to secret keys.At the same time
it achieves the aim of one time one key and can defend exhaustive attack