The Boomerang Attack on 5 and 6-Round Reduced AES.

Alex Biryukov The Boomerang Attack on 5 and 6-Round Reduced AES. 11-15 2004 conf/aes/2004 AES Conference http://dx.doi.org/10.1007/11506447_2 db/conf/aes/aes2004.html#Biryukov04