Camellia Design and Analysis document refers to a paper:

[24] M. Matsui, "Differential Path Search of the Block Cipher E2," (in Japanese), Technical report of IE- ICE, ISEC99-19, pp.57-64, The Institute of Electronics, Information and Communication Engineers, 1999

Does someone know the algorithm presented in the above paper, as I couldn't find the paper. It will be great if someone can link to the paper or the portion containing algorithm contents.

  • $\begingroup$ @Biv I think the question asks us to find the paper or its content actually. $\endgroup$
    – SEJPM
    Commented Mar 13, 2017 at 16:22
  • $\begingroup$ It's paywalled, but I think this is the right one: ci.nii.ac.jp/naid/110003297502/en $\endgroup$
    – pg1989
    Commented Mar 15, 2017 at 23:18
  • $\begingroup$ Matsui and his collaborator wrote another paper on E2 in 1999, "Cryptanalysis of a Reduced Version of the Block Cipher E2" (available in proceedings of FSE) which may contain some of the same techniques. You can also try emailing Matsui and seeing if a non-Japanese version of the tech report is available. $\endgroup$
    – pg1989
    Commented Mar 15, 2017 at 23:22
  • $\begingroup$ @pg1989 actually it is in Japanese! I will look in the paper you mentioned, and update the question $\endgroup$
    – crypt
    Commented Mar 16, 2017 at 5:24
  • $\begingroup$ Section 3.1 of Shirai, Kanamaru, and Abe is not the original source, but it's a more or less clear description of the method applied to Camellia. Note that today this kind of task would be done with a MILP solver much more easily and conveniently. $\endgroup$ Commented Apr 3, 2018 at 2:23


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