New related key rectangle attacks on reduced AES 192 and AES 256

In this paper, we examine the security of reduced AES-192 and AES-256 against related-key rectangle attacks by exploiting the weakness in the AES key schedule. We find the following two new attacks: 9-round reduced AES-192 with 4 related keys, and 10-round reduced AES-256 with 4 related keys. Our re