A Secure Software Implementation of Nonlinear Advanced Encryption Standard

Abstract

Advanced Encryption Standard algorithm (AES) was introduced to resist classical methods of cryptanalysis (i.e.) from linear or differential attacks. The cryptographic strength of the AES depends strongly depends on the choice of S-box. The result of the new attack methods shows that there may be some lacuna in the design of S-box in AES algorithm. The setback is the weakness of the existing linearity structure in the Sbox. After a detail analyze on the AES algorithm and a new performance scheme for rising complication of nonlinear transformation in the structure of Sbox is presented. In order to resist from the new attacks and to execute the AES with the protected encryption and decryption by using verilog and to provide a further more protection a Bio-metric scheme has been used in both the encryption and decryption schemes. The result shows that the new nonlinear implementation of the AES S-Box by using Verilog provides enhanced security with good enough speed for encryption and decryption.