Cryptology ePrint Archive: Report 2015/1080

Variations to the cryptographics algorithms AES and TWOFISH

P. Freyre, N. Díaz and O. Cuellar

Abstract: The cryptographic algorithms AES and Two fish guarantee a high dif fusion by the use of fixed 4x4 MDS matrices. In this article variations to the algorithms AES and Two fish are made. They allow that the process of cipher - decipher come true with MDS matrices selected randomly from the set of all MDS matrices with the use of proposed algorithm. A new key schedule with a high di ffusion is designed for the algorithm AES. Besides proposed algorithm generate new S - box that depends of the key.

Category / Keywords: secret-key cryptography / Block Cipher, AES, Twofish, S-boxes, MDS matrix.

Date: received 6 Nov 2015, last revised 28 Mar 2016

Contact author: pfreyre at matcom uh cu

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Version: 20160328:175203 (All versions of this report)

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