A Self-Adaptive Image Encryption Algorithm Based on Composite Discrete Chaotic System

Composite discrete chaotic iterative system keeps all characteristics of single chaotic iterative system and its dynamic behavior is more complicated. While the key generated from composite discrete chaotic iterative system is independent identically distributed, encrypt the image by using the key and self- adaptive image scramble algorithm can get a satisfied result. When the length of the entire key is more than 128 bits, the encryption system is very strong under attack.