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Improved Related-Key Impossible Differential Attacks on Reduced-Round AES-192

  • Wentao Zhang
  • Wenling Wu
  • Lei Zhang
  • Dengguo Feng
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4356)

Abstract

In this paper, we present several new related-key impossible differential attacks on 7- and 8-round AES-192, following the work of Eli Biham et al. [6] and Jakimoski et al. [10]. We choose another relation of the related keys, start attacks from the very beginning(instead of the third round in [6]) so that the data and time complexities are improved largely, and only two related keys are needed instead of 32 in the attacks of [6]. Furthermore, we point out and correct an error in [6] when they attacked 8-round AES-192, then present our revised attacks. Finally, we give a new related-key differential attack on 7-round AES-192, which mainly uses a property of MixColumns operation of AES.

Keywords

AES cryptanalysis related-key differentials impossible differentials 

References

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Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Wentao Zhang
    • 1
  • Wenling Wu
    • 2
  • Lei Zhang
    • 2
  • Dengguo Feng
    • 2
  1. 1.State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences, Beijing 100049P.R. China
  2. 2.State Key Laboratory of Information Security, Institute of Software, Chinese Academy of Sciences, Beijing 100080P.R. China

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