A Meet in the Middle Attack on Reduced Round Kiasu-BC
Mohamed F. Tolba, Ahmed Abdelkhalek, Amr Youssef · IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences · 2016
Kiasu-BC is a recently proposed tweakable variant of the AES-128 block cipher. The designers of Kiasu-BC claim that no more than 7-round Meet-in-the-Middle (MitM) attack can be launched against it. In this letter, we present a MitM attack, utilizing the differential enumeration technique, on the 8-round reduced cipher. The attack has time complexity of 2116 encryptions, memory complexity of 286 128-bit blocks, and data complexity of 2116 plaintext-tweak combinations.