Known-Key Attacks on Rijndael with Large Blocks and Strengthening ShiftRow Parameter

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• 作者：Yu Sasaki
• 关键词：Rijndael ; known ; key attack ; Super ; Sbox analysis ; truncated differential path ; ShiftRow
• 刊名：Lecture Notes in Computer Science
• 出版年：2010
• 出版时间：2010
• 年：2010
• 卷：6434
• 期：1
• 页码：301-315
• 全文大小：324.8 KB

文摘

In this paper, we present known-key attacks on block cipher Rijndael for 192-bit block and 256-bit block. Our attacks work up to 8 rounds for 192-bit block and 9 rounds for 256-bit block, which are one round longer than the previous best known-key attacks. We then search for the parameters for the ShiftRow operation which is stronger against our attacks than the one in the Rijndael specification. Finally, we show a parameter for 192-bit block which forces attackers to activate more bytes to generate a truncated differential path, and thus enhances the security against our attacks.