Journal of Computer Science

On the Presence of Cascading Effect in the Key Expansion Mechanism of Rijndael-The AES

Y. Talwar, C.E. Veni Madhavan and Navin Rajpal

DOI : 10.3844/jcssp.2006.144.147

Journal of Computer Science

Volume 2, Issue 2

Pages 144-147

Abstract

Rijndael-The AES is 128-bit block cipher based on an elegant algebraic structure over F28. This cipher employs a simple approach to its substitution, permutation (SP) operations. We take a close look on the Key Expansion Mechanism of Rijndael - The AES. This study highlights on the presence of the cascading effect in its key expansion mechanism. Thus, lowering the brute-force key guess attack by a factor of 231. Hence, for the key size of 128 bits the key diversity is 297 instead of 2128.

Copyright

© 2006 Y. Talwar, C.E. Veni Madhavan and Navin Rajpal. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.