Jiqiang Lu Orr Dunkelman Nathan Keller Jongsung Kim New Impossible Differential Attacks on AES. 279-293 2008 INDOCRYPT http://dx.doi.org/10.1007/978-3-540-89754-5_22 conf/indocrypt/2008 db/conf/indocrypt/indocrypt2008.html#LuDKK08