Digital image DCT domain encryption method based on Hyperhenon mapping
D. Tian · Jisuanji gongcheng yu sheji · 2008
An improved image encryption method is proposed based on chaotic sequence.Firstly,chaotic sequences are generated based on Hyperhenon mapping and it is applied to pre-encrypt the image in spatial domain.Then further processing are used for pretreated image,including DCT and coefficient scrambling based on Logistic mapping.A method of accessing the effect of encryption is also presented.Simulation results indicate that the method has good efficiency and security characteristic.