An Image Encryption Algorithm Based on Image Block and Key Feedback Mechanism
Guo‐Ping Jiang · Computer Technology and Development · 2012
In analyzing the disadvantages of traditional and iterative image scrambling methods and static image gray value exchange methods,a new algorithm is proposed based on uniform and key feedback mechanism.The key idea of the algorithm is based on uniform block scrambling,and according to different attributes of each pixel dynamically select the different chaotic sequence for gray value encryption based on key feedback mechanism.Matlab simulation results show that the algorithm scrambling algorithm has obvious advantage in terms of relevant adjacent pixels;Feedback mechanisms and dynamic chaotic system makes the gray-scale value has a large key space,excellent resistance to express,ciphertext attack;The time complexity of encryption algorithm is reasonable and the security is high.