Variations to the Cryptographics Algorithms AES and Twofish

The Cryptographics Algorithms AES and Twofish guarantee a high diffusion with the use of fixed MDS matrices of size 4 × 4. In this article variations to the Cryptographics Algorithms AES and Twofish are made. They allow that the process of cipher decipher come true with MDS matrices selected randomly from an algorithm that obtaining an MDS matrix of set of all the MDS matrices possible. A new Schedule of key with a high diffusion is designed for the Algorithm Cryptographic AES. Besides it is proposed a new S box that he varies in function of the key.