Wentao Zhang Wenling Wu Lei Zhang Dengguo Feng Improved Related-Key Impossible Differential Attacks on Reduced-Round AES-192. 15-27 2006 conf/sacrypt/2006 Selected Areas in Cryptography http://dx.doi.org/10.1007/978-3-540-74462-7_2 db/conf/sacrypt/sacrypt2006.html#ZhangWZF06