A chaotic cryptosystem for color image with dynamic look-up table

Abstract

The chaotic cryptosystems have been widely investigated to provide fast and highly secure image encryption. In this paper, we introduce a novel cryptosystem for color image based on chaos by using a dynamic Look-Up Table (LUT). We utilized the Logistic Map chaotic system in order to benefit from its sensitivity to initial conditions. The result shows that the proposed cryptosystem have many characteristics such as high security, high sensitivity and high speed that can be applied in the encryption of color images. It is demonstrated that the NPCR = 99.6140 %, the UACI = 33.5448% and entropy = 7.9984 can satisfy security and performance requirements. Simulations show that the proposed cryptosystem has high security and resist various typical attacks.