Research Article Open Access

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

Y. Talwar1, C.E. Veni Madhavan2 and Navin Rajpal1
  • 1 ,
  • 2 , Afganistan
Journal of Computer Science
Volume 2 No. 2, 2006, 144-147

DOI: https://doi.org/10.3844/jcssp.2006.144.147

Submitted On: 28 August 2005 Published On: 28 February 2006

How to Cite: Talwar, Y., Madhavan, C. V. & Rajpal, N. (2006). On the Presence of Cascading Effect in the Key Expansion Mechanism of Rijndael-The AES . Journal of Computer Science, 2(2), 144-147. https://doi.org/10.3844/jcssp.2006.144.147

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.

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Keywords

  • Cascading effect
  • key expansion mechanism
  • AES