Nested chaotic image encryption scheme using two-diffusion process and the Secure Hash Algorithm SHA-1

Security of multimedia data becomes an obligation, due the increasing use in smart embedded systems and other domains such as medical industrial and engineering applications. In this paper, we propose a fast, secure and light weight scheme for digital image encryption based on nested chaotic attractors using the Secure Hash Algorithm SHA-1 using only two-diffusion process. The results of security analysis such as statistical tests, differential attacks, key space, key sensitivity, entropy information and the running time are illustrated and compared to recent encryption schemes where the highest security level and speed are improved.