Rijndael algorithm

The Rijndael algorithm was chosen for the Advanced Encryption Standard (AES). Using either the attached tutorial, or your own sources of information, pick one (or more) steps of the algorithm and explain it in some detail to your classmates. [Note: if you are uneasy about running the tutorial executable on your machine, you can use another source (which you should cite) rather than running the tutorial.Rijndael algorithm]