Enhancing The Encryption Process Of Advanced Encryption Standard (AES) By Using Proposed Algorithm To Generate S-Box

Abstract

Information security is a very important issue in data communication. Any loss or threat to information transfer can prove to be great loss in the process of sending information. Encryption technique plays a main role in information security systems. The advanced encryption standard algorithm is widely accepted due to its strong encryption, complex processing and its resistance to Brute-force attack. This paper presents a proposed algorithm to enhance the encryption process of advanced encryption standard algorithm (AES) by introducing a new algorithm to generate dynamic S-Box from cipher key. This algorithm will lead to generate more secure block ciphers, and solve the problem of the fixed structure S-Boxes and will increase the security level of the AES block cipher system. The main advantage of this algorithm is that many S-Boxes can be generated by changing cipher key. The proposed algorithm leads to increase the complexity of encryption process and makes the differential and linear cryptanalysis more difficult. MATLAB (R2013a) program is used for simulation.