Security enhancement using modified aes and diffie–hellman key exchange

Abstract

In today’s world, providing data security is a primary concern. For this purpose, many researchers have introduced asymmetric and symmetric algorithms to ensure security. But they are not resistant to many attacks. In this paper, we combine symmetric and asymmetric techniques to provide more security. Advanced Encryption Standard algorithm is modified by generating Dynamic S-Boxes (DS-Boxes) to provide a better attack-resistant algorithm. In our approach, Diffie–Hellman is used to generate and exchange both keys and random numbers. These random numbers create DS-Boxes used in Modified AES. The proposed algorithm is resistant to timing attacks, linear, and differential cryptanalysis attacks due to the usage of DS-Boxes.