Chaos-based Color Image Encryption Using One-time Keys and Choquet Fuzzy Integral

Abstract

Abstract This paper proposes a chaos-based color image encryption scheme using one-time keys and Choquet fuzzy integral (CFI). The major core of the encryption algorithm is a pseudo-random number generator based on the CFI, and the key is plain-image dependent. Before encrypting the color image, the hash function is applied to generate the 256-bit key, and the hyper chaotic Qi system is iterated for limited times to generate the initial parameters sequences for the CFI. The outputs of the CFI are employed to confuse and diffuse the red, green and blue components for the image respectively. Experiment results and security analysis show that the scheme not only can achieve good encryption result and large key space, but also can resist against common attacks, so the scheme is reliable to be adopted for image encryption in secure communications.