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

  • Yu Sasaki
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6434)

Abstract

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.

Keywords

Rijndael known-key attack Super-Sbox analysis truncated differential path ShiftRow 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Yu Sasaki
    • 1
  1. 1.NTT Information Sharing Platform LaboratoriesNTT CorporationMusashino-shiJapan

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