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Paper: Impossible Differential Cryptanalysis of ARIA and Camellia

Authors:
Wenling Wu
Wentao Zhang
Dengguo Feng
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URL: http://eprint.iacr.org/2006/350
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Abstract: This paper studies the security of the block ciphers ARIA and Camellia against impossible differential cryptanalysis. Our work improves the best impossible differential cryptanalysis of ARIA and Camellia known so far. The designers of ARIA expected no impossible differentials exist for 4-round ARIA. However, we found some nontrivial 4-round impossible differentials, which may lead to a possible attack on 6-round ARIA. Moreover, we found some nontrivial 8-round impossible differentials for Camellia, whereas only 7-round impossible differentials were previously known. By using the 8-round impossible differentials, we presented an attack on 12-round Camellia without $FL/FL^{-1}$ layers.
BibTeX
@misc{eprint-2006-21841,
  title={Impossible Differential Cryptanalysis of  ARIA and Camellia},
  booktitle={IACR Eprint archive},
  keywords={secret-key cryptography /},
  url={http://eprint.iacr.org/2006/350},
  note={ wwl@is.iscas.ac.cn 13439 received 18 Oct 2006},
  author={Wenling Wu and Wentao Zhang and Dengguo Feng},
  year=2006
}