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The Improbable Differential Attack: Cryptanalysis of Reduced Round CLEFIA

Authors:
Cihangir Tezcan
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URL: http://eprint.iacr.org/2010/435
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Abstract: In this paper we present a new statistical cryptanalytic technique that we call improbable differential cryptanalysis which uses a differential that is less probable when the correct key is used. We provide data complexity estimates for this kind of attacks and we also show a method to expand impossible differentials to improbable differentials. By using this expansion method, we cryptanalyze 13, 14, and 15-round CLEFIA for the key sizes of length 128, 192, and 256 bits, respectively. These are the best cryptanalytic results on CLEFIA up to this date.
BibTeX
@misc{eprint-2010-23336,
  title={The Improbable Differential Attack: Cryptanalysis of Reduced Round CLEFIA},
  booktitle={IACR Eprint archive},
  keywords={secret-key cryptography / Cryptanalysis, Improbable differential attack, CLEFIA},
  url={http://eprint.iacr.org/2010/435},
  note={Unpublished forgottenlance@gmail.com 14829 received 8 Aug 2010},
  author={Cihangir Tezcan},
  year=2010
}