A new bit-level permutation image encryption algorithm
Adrian-Viorel Diaconu, Valeriu Manuel Ionescu, Gabriel Vasile Iana, José Manuel López-Guede · 2016
A new chaotic, permutation-substitution architecture based, image encryption algorithm is introduced in this paper. In order to reduce redundancies of Fridrich's structure based image encryption scheme, a novel inter-intra bit-level permutation based confusion strategy is appealed. By means of the proposed confusion stage, statistical properties of the image produced at its output are enhanced (that is, the bit distribution of each bit plane is more uniform and correlation between neighboring higher bit planes is reduced). Also, the proposed image cryptosystem takes advantage of Sudoku grids as to ensure a high performance diffusion process and a higher key space as well. Based on the theoretical arguments and the Matlab implementation, the conducted study demonstrates that the proposed images' encryption algorithm has a desirable level of security.