An Improved AES Cryptosystem Based Genetic Method on S-Box, With, 256 Key Sizes and 14-Rounds

Abstract

Cryptography methods are widely use in digital communication for secure data transaction. Cryptography methods have two categories symmetric and asymmetric. Both types of encrypting have their own importance and limitations. In Symmetric key based encryption same key is use for encryption and decryption process. One of the most popular and widely used symmetric encryption methods is (AES) Advance encryption standard, which attracts researchers to develop more efficient AES cryptosystem. In this research work we are presenting an improved AES encryption method “IAES”. Proposed IAES method uses a modified S-Box by employing Genetic algorithm (GA) with key size of 256 bit. In proposed method IAES, GA will be used in the S-box to perform various pipelined operations such as substitution, shifting of rows, mixing of column and to perform Add Round Key in the AES rounds. In this work proposed IAES and existing AES method both are implemented over MATLAB simulator and various comparison parameters such as encryption time, speed and decryption time and speed are calculated. The high level of system integration along with high speed and high throughput makes the proposed IAES based cryptosystem a perfect choice for a spread of application.