New cryptosystem using Vigenere and multiple bit-level permutations
Abdellatif Jarjar · The Journal of applied sciences research · 2021
The largest part of the image encryption algorithms operates on the pixel as a central element by implementing diffusion confusion and eventually a permutation. On the other side, a permutation applied at the bit level changes not only the pixel value, but also its location within the image. In this work, we will propose a new technology for medical and color image encryption, which starts with an application of an improved Vigenere method acting at the pixel level to overcome any differential attack, followed by an implementation of several chaotic permutations acting at the bit level. Simulations performed on a large number of images of different sizes and formats ensure that our method is not subject to any known attacks.