Enhancing 3D-playfair algorithm to support all the existing characters and increase the resistanceto brute force and frequency analysis attacks

Play Fairal gorithm has been enhanced in various ways. One of the methods is to increase the confusion rates by transforming the algorithm into 3D-playfair which has four tables of 4×4 and accepts trigraph rather than digraph. This paper further enhances the 3D-playfair algorithm by extending its tables and hereby increasing the security level as well as supporting the characters of all the world's living languages. This is achieved by using four matrices of 128×128 to store all the possible characters which are 65536. As a result, the proposed algorithm has more resistanceto brute force andfrequency analysis attacks.