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

Journal of Computer Science

C. E.V. Madhavan¹  Navin Rajpal¹  Y. Talwar¹ 

关键词: Cascading effect;    key expansion mechanism;    AES;   

DOI  :  10.3844/jcssp.2006.144.147

学科分类：计算机科学（综合）

来源: Science Publications

【 摘 要 】

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.

【 授权许可】

Unknown