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Improving the efficiency of impossible differential cryptanalysis of reduced camellia and MISTY1

  • Jiqiang Lu*
  • , Jongsung Kim
  • , Nathan Keller
  • , Orr Dunkelman
  • *此作品的通讯作者
  • Royal Holloway University of London
  • Korea University
  • Hebrew University of Jerusalem
  • KU Leuven

科研成果: 书/报告/会议事项章节会议稿件同行评审

摘要

We observe that when conducting an impossible differential cryptanalysis on Camellia and MISTY1, their round structures allow us to partially determine whether a candidate pair is useful by guessing only a small fraction of the unknown required subkey bits of a relevant round at a time, instead of guessing all of them at once. Taking advantage of the early abort technique, we improve a previous impossible differential attack on 6-round MISTY1 without the FL functions, and present impossible differential cryptanalysis of 11-round Camellia-128 without the FL functions, 13-round Camellia-192 without the FL functions and 14-round Camellia-256 without the FL functions. The presented results are better than any previously published cryptanalytic results on Camellia and MISTY1 without the FL functions.

源语言英语
主期刊名Topics in Cryptology - CT-RSA 2008 - The Cryptographers' Track at the RSA Conference 2008, Proceedings
出版商Springer Verlag
370-386
页数17
ISBN(印刷版)3540792627, 9783540792628
DOI
出版状态已出版 - 2008
已对外发布
活动Cryptographers' Track at the RSA Conference, CT-RSA 2008 - San Francisco, CA, 美国
期限: 8 4月 200811 4月 2008

出版系列

姓名Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
4964 LNCS
ISSN(印刷版)0302-9743
ISSN(电子版)1611-3349

会议

会议Cryptographers' Track at the RSA Conference, CT-RSA 2008
国家/地区美国
San Francisco, CA
时期8/04/0811/04/08

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