Improved meet-in-the-middle attacks on 7-round AES-192 and 8-round AES-256
Xiao-li DONG,Yu-pu HU,Jie CHEN,Shun-bo LI,Yang YANG
Journal on Communications . 2010, (9A): 197 -201 .  DOI: 1000-436X(2010)9A-0197-05