ABSTRACT
In 1976, NIST standardized a block cipher, Data Encryption Standard (DES),
and anticipated that it would be used until the end of 1996 for a 20-year period.
However, there was no new cipher standardized until 2000. NIST called the
submission for AES: Advanced Encryption Standard, A Crypto Algorithm for
the 21 Century. There were 15 AES Candidates submitted in August 1998.
After first and second AES Candidate Conferences, the top 5 AES Candidates
(Rijndael, Twofish, Serpent, RC6, and Mars) were determined in August 1999.
Third AES Candidate Conference was held in April 2000 at New York, and
in October 2000, the final candidate, Rijndael, designed by Joan Daemen and
Vincent Rijmen, was selected. Since the period of fully adopting AES Rijndael
and the DES’s out of a lifetime, triple DES is currently used in many practical
systems.
