THE HIDING OF IMAGE DATA USING S-BOXES BASED ON LINEAR FRACTIONAL TRANSFORMATION

Abstract

Digital image divulgence is being practiced as an indispensable approach to information channeling across the board. The credibility of images in the course of conveyance has now become a crucial assignment to work upon. Thereupon, significantly more surveillance has been devoted to contriving the non-linear component acknowledged as the substitution box (S-box), which possesses the caliber to outlast against unauthorized intrusion. The suggested piece of work comprises two portions; the first part proposes a technique to generate a secured non-linear component of block cipher (S-box) underpinning both the Galois field and the Mobius transformation. Besides, the elements of ????????(28) created via fastidious kinds of primitive irreducible elements are practiced for the realization of Mobius transformation. In the other portion, applications of the S-box are applied to digital image encryption centered on the Advanced Encryption Standard (AES) in MATLAB. Ultimately, the competence of the designed S-box is scrutinized through bringing into efficacious action of multiple procedures from literature to wit, strict avalanche criterion, nonlinearity, linear approximation probability, Histogram analysis, bit independence criterion, and differential approximation probability.”