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General Information
    • ISSN: 2010-3719 (Online)
    • Abbreviated Title: Int. J. Inf. Electron. Eng.
    • Frequency: Quarterly
    • DOI: 10.18178/IJIEE
    • Editor-in-Chief: Prof. Chandratilak De Silva Liyanage
    • Executive Editor: Jennifer Zeng
    • Abstracting/ Indexing : Google Scholar, Electronic Journals Library, Crossref and ProQuest,  INSPEC (IET), EBSCO.
    • E-mail ijiee@ejournal.net
Editor-in-chief

 
University of Brunei Darussalam, Brunei Darussalam   
" It is a great honor to serve as the editor-in-chief of IJIEE. I'll work together with the editorial team. Hopefully, The value of IJIEE will be well recognized among the readers in the related field."

IJIEE 2020 Vol.10(2): 40-43 ISSN: 2010-3719
DOI: 10.18178/IJIEE.2020.10.2.718

Differential Cryptanalysis of Block Cipher Halka

Yasutaka Igarashi, Shun Nakazawa, and Toshinobu Kaneko
Abstract—Halka is a lightweight block cipher proposed by Sourav Das in 2014. The block length of Halka is 64 bits and its key length is 80 bits. Halka uses 8-bit S-box for nonlinear permutation and uses bit shuffle for the linear permutation. In the differential cryptanalysis by the designers, the number of active S-box at each round is estimated to be 2, and differential attack can be mounted up to 5 rounds of Halka. In this article, focusing on Halka that has bit shuffle and 1-bit difference of active S-box at each round, we derive the new maximum differential characteristic probability (DCP). By analyzing trellis diagram of differential trails, we newly find that the maximum DCP of Halka is 260 for 10 rounds of single trail and 262.58 for 13 rounds of multiple trail, which are the results that the designers would not report.

Index Terms—Differential cryptanalysis, block cipher Halka, multiple trail, 1-bit difference.

Y. Igarashi and T. Kaneko are with the Department of Electrical Engineering, Tokyo University of Science, Noda, Chiba, 2788510 Japan (e-mail: yasutaka@rs.noda.tus.ac.jp).
S. Nakazawa was with the Department of electrical engineering, Tokyo University of Science, Noda, Chiba, 2788510 Japan.

[PDF]

Cite: Yasutaka Igarashi, Shun Nakazawa, and Toshinobu Kaneko, "Differential Cryptanalysis of Block Cipher Halka," International Journal of Information and Electronics Engineering vol. 10, no. 2, pp. 40-43, 2020.

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