Improved Meet-in-the-Middle cryptanalysis of KTANTAN (poster)

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Improved Meet-in-the-Middle cryptanalysis of KTANTAN (poster)

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Title: Improved Meet-in-the-Middle cryptanalysis of KTANTAN (poster)
Author: Wei, Lei; Rechberger, Christian; Guo, Jian; Wu, Hongjun; Wang, Huaxiong; Ling, San
Copyright year: 2011
Abstract: This paper presents ongoing work towards extensions of meet-in-the-middle (MITM) attacks on block ciphers. Exploring developments in MITM attacks in hash analysis such as: (i) the splice-and-cut technique; (ii) the indirect-partial-matching technique. Our first contribution is that we show corrections to previous cryptanalysis and point out that the key schedule is more vulnerable to MITM attacks than previously reported. Secondly we further improve the time complexities of previous attacks with (i) and (ii), now the 80-bit secret key of the full rounds KTANTAN-{32,48,64} can be recovered at time complexity of 272.9, 273.8 and 274.4 respectively, each requiring 4 chosen-plaintexts.
Subject: DRNTU::Engineering::Computer science and engineering.
Type: Conference Paper
Conference name: Lecture Notes in Computer Science
School: School of Physical and Mathematical Sciences
Rights: © 2011 Springer Verlag.   This is the author created version of a work that has been peer reviewed and accepted for publication by Lecture Notes in Computer Science, Springer Verlag.  It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document.  The published version is available at: http://dx.doi.org/10.1007/978-3-642-22497-3_31 .
Version: Accepted version

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