A Novel Variable Step Size Approach for Generating Binary Chaotic Sequences and Its Application to Image Encryption
Ruisong Ye · Microcomputer applications · 2009
An improved chaotic binary sequences algorithm based on one four-dimension chaotic map is proposed.Through the analysis and experiments for certain important characteristics of chaotic sequences,we show that the improved chaotic sequences have better correlation,sensitivity with good frequency test and sequence test.The binary sequences generated by the proposed algorithm are applied to image encryption.The final image is obtained by linear image fusion of both the encrypted image and the object image.The simulation and analysis show that the algorithm has a large space of keys,good statistical characteristic,strong anti-noise ability and high efficiency,and the encryption effect is greatly sensitive to the keys.