AES (Advanced Encryption Standard) is a symmetric encryption algorithm whose encryption key can take on
128,192 or 256 bits.
It uses a block diagram that performs complex encryption operations using internal functions
(permutation, substitution).
AES expands on the foundations of its ancestor called DES. This algorithm is still used today.
AES is considerably more secure than DES due to its longer key length, it also has better performance, it is more complex and more difficult to crack.