Presentation 1999/7/22
Differential Attack on CRYPTON
Haruki SEKI, Toshinobu KANEKO,
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Abstract(in English) An block cipher CRYPTON based on the structure of SQUARE is a candidate algorithm for the AES. Recently Lim changes the S-box construction and key scheduling, and suggested modified version (version 1.0). In this paper we present an attack on CRYPTON reduced to 5 rounds. This attack is based on impossible differentials. 4 rounds of CRYPTON has impossible differential, we use this to show that CRYPTON version 1.0 reduced to 5 rounds can be attacked using 2^<83.4> chosen plaintext and ciphertext pairs. This attack can be also applied to CRYPTON version 0.5 using less chosen plaintext and ciphertext pairs.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Block cipher / CRYPTON / Impossible differential attack
Paper # ISEC99-22
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Committee ISEC
Conference Date 1999/7/22(1days)
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Registration To Information Security (ISEC)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Differential Attack on CRYPTON
Sub Title (in English)
Keyword(1) Block cipher
Keyword(2) CRYPTON
Keyword(3) Impossible differential attack
1st Author's Name Haruki SEKI
1st Author's Affiliation Telecommunications Advancement Organization of Japan()
2nd Author's Name Toshinobu KANEKO
2nd Author's Affiliation Department of Electrical Engineering, Science University of TOKYO
Date 1999/7/22
Paper # ISEC99-22
Volume (vol) vol.99
Number (no) 208
Page pp.pp.-
#Pages 8
Date of Issue