Mehdi-Laurent Akkar Christophe Giraud An Implementation of DES and AES, Secure against Some Attacks. 309-318 2001 conf/ches/2001 CHES Generators http://link.springer.de/link/service/series/0558/bibs/2162/21620309.htm db/conf/ches/ches2001.html#AkkarG01