Advanced Encryption Standard (AES) is a symmetric key cipher technique used to secure and encrypt operating systems, hard drives, networking systems, files, e-mails, and other similar data.In cryptography, AES consist of three block ciphers taken from a larger collection published originally as Rijndael.ES encryption is used around the world to secure some of the most protected systems for both governmental groups and business. AES encryption is even used by individuals to protect private computers and networking systems. It is now the standard set by the US government and individuals worldwide.