The National Institute of Standards and Technology (NIST) created a procedure to select a symmetric-key encryption algorithm to protect sensitive federal information. The Advanced Encryption Standard (AES) is a standard used by the U.S. government. It was announced by NIST after 5 years of a standardization process, in which many designs were evaluated before the solution was selected.

•Based on your understanding of how AES was chosen, what is your opinion of the criteria used?
•Why do you think these criteria were important?
•What do you think about the effectiveness and ease of use of AES?

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First of all it must be seen the broader context of selecting the AES algorithm. It was wanted a successor for DES and AES (Rijndael) was preferred to other four candidates, namely MARS, RC6, Serpent and Twofish. The factors that contributed to its election are similar with the criteria used for testing any software and hardware product. More exactly, the decision was made based on the scores obtained by combining the used criteria.
A famous draw that is reproduced below was included by Jeff Moser in his work called “A Stick Figure Guide to the Advanced Encryption Standard (AES)” (Moser J.)...

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