Design of a SHA-2 Hash Based Image Encryption Scheme using 1D chaotic systems and DNA sequences

摘要: This paper proposes design of a color image encryption technique performed on DNA sequences, the main objective this is to make it plaintext sensitive. 1D chaotic systems are iterated with SHA-256 hash function value plain as part initial conditions for maps. The values calculated all RGB components separately. These effective dynamically updating secret keys. With minimum loss information keys become sensitive towards any changes in image. real numbers transformed integers and key matrices derived from random integer sequences converted sequences. Using parameter enhances security against various attacks such chosen attack known attack. algorithm has larger space changing key, change. scheme employs two different diffusion mechanism permutation sequence block size changed. also parameters. Experimental results further justify sensitiveness parameters key.