Theoretical analysis of χ2attack on RC6

Authors:
Masahiko Takenaka;Takeshi Shimoyama;Takeshi Koshiba
Affiliations:
Secure Computing Lab., Fujitsu Laboratories Ltd., Kawasaki, Japan;Secure Computing Lab., Fujitsu Laboratories Ltd., Kawasaki, Japan;Secure Computing Lab., Fujitsu Laboratories Ltd., Kawasaki, Japan
Venue:
ACISP'03 Proceedings of the 8th Australasian conference on Information security and privacy
Year:
2003

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Abstract

In this paper, we give a theoretical analysis of χ2 attack proposed by Knudsen and Meier on the RC6 block cipher. To this end, we propose the method of security evaluation against χ2 attack precisely including key dependency by introducing a method "Transition Matrix Computing." Previously, no theoretical security evaluation against χ2 attack was known, it has been done by computer experiments. We should note that this is the first results that a theoretical evaluation against χ2 attack is shown.