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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/4373

Title: The security of RC6 against asymmetric Chi-square test attack
Authors: Hinoue, Tomohiko
Miyaji, Atsuko
Wada, Takatomi
Issue Date: 2007-09
Publisher: 情報処理学会
Magazine name: 情報処理学会論文誌
Volume: 48
Number: 9
Start page: 2966
End page: 2975
Abstract: Knudsen and Meier applied the χ^2-attack to RC6. The χ^2-attack recovers a key by using high correlations measured by χ^2-value. The best χ^2-attacks to RC6 whose security is guaranteed theoretically works on 16-round RC6 with 192- and 256-bit key but just 8-round RC6 with 128-bit key, because it recovers keys of RC6 symmetrically, which requires a time complexity of #plaintexts ×2^<54> and a memory complexity of 2^<80> for recovering one key. In this paper, we improve the χ^2-attack to reduce the time complexity. We give the theorem that evaluates the success probability of the χ^2-attack on RC6 without using any experimental result. Our key recovery attack recovers keys asymmetrically, which requires a time complexity of #plaintexts ×2^<31> and a memory complexity of 2^<52> for recovering one key. As a result, our key recovery attack works on 16-round RC6 with 192- and 256-bit key and 12-round RC6 with 128-bit key. In the case both of 196- and 256-bit keys, our attack surprisingly reduces the time and memory complexity compared with that of the previous attack. We also demonstrate our theorem on RC6-8/4/8 and make sure of the accuracy by comparing our approximation with the experimental results.
Rights: 社団法人 情報処理学会, Tomohiko Hinoue/Atsuko Miyaji/Takatomi Wada, 情報処理学会論文誌, 48(9), 2007, 2966-2975. ここに掲載した著作物の利用に関する注意: 本著作物の著作権は(社)情報処理学会に帰属します。本著作物は著作権者である情報処理学会の許可のもとに掲載するものです。ご利用に当たっては「著作権法」ならびに「情報処理学会倫理綱領」に従うことをお願いいたします。 Notice for the use of this material: The copyright of this material is retained by the Information Processing Society of Japan (IPSJ). This material is published on this web site with the agreement of the author (s) and the IPSJ. Please be complied with Copyright Law of Japan and the Code of Ethics of the IPSJ if any users wish to reproduce, make derivative work, distribute or make available to the public any part or whole thereof. All Rights Reserved, Copyright (C) Information Processing Society of Japan.
URI: http://hdl.handle.net/10119/4373
Material Type: author
Appears in Collections:b10-1. 雑誌掲載論文 (Journal Articles)

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