Niels Ferguson John Kelsey Stefan Lucks Bruce Schneier Michael Stay David Wagner Doug Whiting Improved Cryptanalysis of Rijndael. 213-230 2000 conf/fse/2000 FSE http://link.springer.de/link/service/series/0558/bibs/1978/19780213.htm db/conf/fse/fse2000.html#FergusonKLSSWW00