AESL

AESL, or the Advanced Encryption Standard Algorithm, is a symmetric key encryption standard adopted by the U.S. federal government in 2001. It was chosen through a public competition to replace the Data Encryption Standard (DES). AESL is based on the Rijndael cipher, developed by Belgian cryptographers Joan Daemen and Vincent Rijmen.

AESL operates on fixed-size blocks of data, typically 128 bits. It supports three key sizes: 128 bits, 192 bits, and 256 bits. The algorithm involves a series of transformations applied iteratively to the data block. These transformations include substitution, permutation, and mixing operations. The number of rounds depends on the key size, with shorter keys requiring fewer rounds.

The security of AESL relies on the complexity of its mathematical operations. Unlike its predecessor DES, which was vulnerable to brute-force attacks due to its relatively small key size, AESL's larger key sizes make such attacks computationally infeasible with current technology. It has been widely adopted globally for securing sensitive data in various applications, including government communications, financial transactions, and cybersecurity. AESL is considered a robust and secure encryption algorithm.