Improved SQUARE Attacks against Reduced-Round HIEROCRYPT (2001)
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by
Paulo S.L.M. Barreto
,
Vincent Rijmen
,
Jorge Nakahara
,
Jr
,
Bart Preneel
,
Joos Vandewalle
,
Joos V
,
Hae Y. Kim
,
Scopus Tecnologia S. A
| Citations: | 7 - 3 self |
BibTeX
@MISC{Barreto01improvedsquare,
author = {Paulo S.L.M. Barreto and Vincent Rijmen and Jorge Nakahara and Jr and Bart Preneel and Joos Vandewalle and Joos V and Hae Y. Kim and Scopus Tecnologia S. A},
title = {Improved SQUARE Attacks against Reduced-Round HIEROCRYPT},
year = {2001}
}
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Abstract
We present improved SQU.aw, attacks against the NESSIE candidate block ciphers HIEROCRYPT-3 and HIEROCRYPT-L1, designed by Toshiba. We improve over the previous best known attack on 2.5 rounds of HIEROCRYPT-3 by a factor of 2 28 computational steps with an attack on 3 rounds for 128-bit keys, and extend it to 3.5 rounds for longer keys. For HIEROCRYPT-L1 we are able to attack up to 3.5 out of 6.5 rounds.
