EXPERIMENTS WITH POSSIBLE MODIFICATIONS OF AES ALGORITHM

Abstract

Advanced Encryption Standard (AES) is a cryptographic standard that emanated trough a public competition announced by the US National Institute of Standard and Technology. Theoretically, this algorithm can be divided into three cryptographic algorithms: AES-128, AES-192 and AES-256. The AES specified by the standard is derived from the slightly more complex Rijndael algorithm from which it inherits fairly large flexibility. The flexibility of the algorithm led into a row of experiments to verify the ability of various modifications of the algorithm to be put in implementation. This paper sets out particular sequences that are substantial for 64-byte and 32-bity encryption and decryption. This work purposely points out a great flexibility of this algorithm and produces an example how its reduced version can be implemented in the field of education. The paper shows only the most interesting concepts elaborated in details in a Master Thesis done at Faculty of Organizational Sciences at the University of Belgrade.