Paper Abstract and Keywords |
Presentation |
2021-03-04 09:25
Four-Block Type-2 Feistel Cipher from Tweakable Block Ciphers Kazuki Nakaya, Tetsu Iwata (Nagoya Univ.) IT2020-118 ISEC2020-48 WBS2020-37 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
A secure block cipher can be obtained from tweakable block ciphers (TBCs). In this paper, by using a TBC with $n$-bit blocks and $n$-bit tweaks, which is relatively easy to design, we propose a construction of a block cipher based on Type-2 Feistel cipher that allows parallel execution of the underlying TBCs. For the obtained block cipher with $4n$-bit blocks, we present the provable security results with $r=4$ and $6$ rounds. We also show an attack that shows the upper bound of the provable security against the $4$-round construction. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Tweakable block cipher / Type-2 Feistel cipher / Chosen-ciphertext attack / Coefficient-H technique / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 120, no. 411, ISEC2020-48, pp. 37-44, March 2021. |
Paper # |
ISEC2020-48 |
Date of Issue |
2021-02-25 (IT, ISEC, WBS) |
ISSN |
Online edition: ISSN 2432-6380 |
Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
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IT2020-118 ISEC2020-48 WBS2020-37 |
Conference Information |
Committee |
WBS IT ISEC |
Conference Date |
2021-03-04 - 2021-03-05 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Online |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Joint Meeting of WBS, IT, and ISEC |
Paper Information |
Registration To |
ISEC |
Conference Code |
2021-03-WBS-IT-ISEC |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Four-Block Type-2 Feistel Cipher from Tweakable Block Ciphers |
Sub Title (in English) |
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Tweakable block cipher |
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Type-2 Feistel cipher |
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Chosen-ciphertext attack |
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Coefficient-H technique |
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1st Author's Name |
Kazuki Nakaya |
1st Author's Affiliation |
Nagoya University (Nagoya Univ.) |
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Tetsu Iwata |
2nd Author's Affiliation |
Nagoya University (Nagoya Univ.) |
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Speaker |
Author-1 |
Date Time |
2021-03-04 09:25:00 |
Presentation Time |
25 minutes |
Registration for |
ISEC |
Paper # |
IT2020-118, ISEC2020-48, WBS2020-37 |
Volume (vol) |
vol.120 |
Number (no) |
no.410(IT), no.411(ISEC), no.412(WBS) |
Page |
pp.37-44 |
#Pages |
8 |
Date of Issue |
2021-02-25 (IT, ISEC, WBS) |
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