In this article, we will present a new image encryption technique. This approach is an improvement to the classic Vigenère cipher. This improvement consists in generating two substitution tables of pseudo-random size. The first S-Box is used to install a confusion phase using a new substitution function. In the next phase, a not necessarily bijective substitution table is used to ensure the diffusion process in order to protect our cryptosystem from any differential attack. The results of standard security tests, on a large volume of images of different sizes and formats, clearly justify the robustness and effectiveness of our method.

The pixel of an image is always thought of as being the most important component in the encryption process. Our new technology will act on the bit by treating it as the key component of the encrypted image by using new dynamic replacement functions and strong diffusion functions that take values from tables of random size substitutions manufactured from multiple linear congruence generators that subscribe to the Hull and Dobell theorem. Two algebraic operators combined with two genetic operators will be applied at the DNA level in the output. In order to demonstrate that, with this new technology, our system is more susceptible to all known assaults, a huge number of images selected at random from databases were engaged in the simulations.

An innovative technique for encrypting colors and medical images will be provided in this paper. It is founded on the creation of many, arbitrary-sized substitution tables that are attached to current replacement and diffusion functions that produced from the chaotic maps employed. By applying an upgraded Vigenère circuit with the built S-Box, a genetic crossover suited to the encoding of color images with multiple chaotic vectors will be adopted. Finally, a genetic mutation is installed under the control of a chaotic table for the reproduction of the encrypted image capable of resisting any unexpected invasion. A massive amount of color images of various sizes and formats being simulated to verify the dependability of our cutting-edge technology.