This standard is used to replace the original DES (Data Encryption Standard) and has been analyzed by multiple parties and widely used worldwide. After a five-year selection process, the Advanced Encryption Standard was published by the National Institute of Standards and Technology (NIST) in FIPS PUB 197 on November 26, 2001, and became an effective standard on May 26, 2002. In 2006, Advanced Encryption Standard (AES) had become one of the most popular algorithms in symmetric key encryption. This algorithm was designed by Belgian cryptographers Joan Daemen and Vincent Rijmen, and was named Rijdael in conjunction with the names of the two authors. It was submitted for the selection process of the Advanced Encryption Standard