Advanced Encryption Standard Using the PIC16XXX
One of the most widely used block cipher algorithms is
the Data Encryption Standard (DES), adopted in 1977
by the American National Standards Institute (ANSI). After more than twenty years of use with continuous aging due to advances in cryptography, the National Institute of Standards and Technology (NIST) on September 12, 1997, started a process to stimulate the development and submission of alternatives to the DES. Twenty-one algorithms were analyzed in the first round and five algorithms were analyzed in the second round. On October 2, 2000 the NIST announced that the new encryption technique, named Advanced Encryption Standard (AES), would use the Rijndael algorithm, designed by two well-known specialists, Joan Daemen and Vincent Rijmen from Belgium. The new AES will be used to protect sensitive information of federal computer systems, as well as many private businesses.