The AES (Advanced Encryption Standard) algorithm [1], known as Rijndael, was so-named by its creators Joan Daemen and Vincent Rijmen, it is the current international standard for communications encryption since october 2000. This algorithm is characterized by a symmetric block cipher with variable key length, the default key length is 128 bits but can also be set to 192 or 256 bits.

The symmetric-key cryptography, also called secret key cryptography, is a cryptographic method using the same key to encrypt and decrypt, ie, that the security of the algorithm is based on the key and not in algorithm. Examples of this type of cryptographic algorithms are: AES, DES, 3DES and RC5.