AES Algorithm: Encryption and Decryption

Abstract

Advanced Encryption Standard (AES) algorithm is one of the most common and widely used symmetric block cipher algorithm. This algorithm has its own particular structure to encrypt and decrypt sensitive data and is applied in hardware and software, all over the world. It is extremely difficult for hackers to get the real data when encrypting by AES algorithm. In AES algorithm, encryption and decryption involves a number of rounds that depends on the length of the key and the number of block columns. So, to improve the strength of the AES the number of rounds is increased. Till date there is not any evidence to crack this algorithm. AES has the ability to deal with three different key sizes such as AES 128, 192 and 256 bit and each of this ciphers has 128 bit block size. This paper will provide an overview of AES algorithm and explain several crucial features of this algorithm in detail.

Comparing Symmetric and Asymmetric cryptography in message encryption and decryption by using AES and RSA algorithms

“…AESAdvanced Encryption Standard (AES) algorithm announced by National Institute of Standard and Technology (NIST) in 2001 as a symmetric encryption algorithm. AES can encrypt/decrypt data length of 128 bits (16 bytes) and a key length of 128 bits, 192 bits (24 bytes) and 256 bits (32 bytes)[6]. The 128 bits consist of 10 rounds, 192 bits is 12 rounds and 14 rounds for 256 bits.…”