About

It was chosen by the National Institute of Standards and Technology (NIST) as the successor to the Data Encryption Standard (DES). AES is a symmetric key algorithm, meaning the same key is used for both encryption and decryption. The algorithm operates on blocks of data rather than individual bits, and the size of the block and the key can vary. AES supports key sizes of 128, 192, and 256 bits, with the larger key sizes providing stronger security. The encryption process involves multiple rounds of substitution, permutation, and linear transformation operations on the data. One of the main advantages of AES is its computational efficiency. It can be implemented in hardware and software efficiently, making it suitable for a wide range of applications. AES is also resistant to various cryptographic attacks, including differential and linear cryptanalysis. The development of AES involved a competition called the Advanced Encryption Standard competition, where multiple encryption algorithms were evaluated based on their security, performance, and flexibility. In 2000, the Rijndael algorithm, developed by Joan Daemen and Vincent Rijmen, was selected as the winner and became the basis for AES. Since its selection, AES has been widely adopted and used in various industries, including finance, government, and telecommunications. It is also integrated into many cryptographic protocols and standards, such as the Secure Sockets Layer (SSL) and the Internet Protocol Security (IPSec). The widespread use and acceptance of AES have contributed to its reputation as a secure and reliable encryption algorithm.