Image Encryption Using Hybrid Cryptographic System Incorporating Three Improved Standards

In order to augment the resistance against any possible known attack, this paper develops a new technique for medical and color image encryption using deep refinements of three classical systems. Two new substitution matrices and their replacement functions will be generated from the chaotic maps used, for an improved Vigenere technique application. At the departure from the Vigenere rotation, the vector is subdivided into sub-blocks with size calculated from the installed chaos, for an engineered application comprising two Feistel rotations supported by genetic operators appropriate for image encryption. In parallel, a new technique traces the building of a large invertible matrix, for an extension of the classical Hill technique. This last method will be assisted by dynamic vectors to exclude any linearity. A solid chaining is established between the encrypted block and the next clear block to avoid any differential attack. Simulations carried out on a large volume of images of different sizes and formats ensure that our approach is not exposed to known attacks.