A Novel Color Image Encryption Algorithm Based on Chaotic Maps

Due to the character of higher security of three-dimensional chaotic systems, a new algorithm based on Chen and Lorenz systems is proposed to encrypt color images. In order to increase the security of the cryptosystem, the algorithm firstly integrates image information into the Lorenz map, and then the image information is also mixed into the Chen map via the Lorenz map. Theoretical analysis and simulation results demonstrate that the key space is larger and the precision of the keys is higher than Xiao et al.[1], so the algorithm can resist the brute-force attacks. In addition, the distribution of grey values of the encrypted image has a random-like behavior, so the algorithm has strong ability against attacks.