Paper Abstract and Keywords |
Presentation |
2023-07-25 10:00
Higher Order Differential Property of Block Cipher LBC-3 Naoki Shibayama, Yasutaka Igarashi (Tokyo Univ. of Science) ISEC2023-47 SITE2023-41 BioX2023-50 HWS2023-47 ICSS2023-44 EMM2023-47 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
LBC-3 is a block cipher proposed by Nyssanbayeva et al. in 2022. The block size is 64-bit, the secret key size is 80-bit, and the recommended number of rounds is 20, respectively. The designer evaluated its security using the avalanche effect, and Yasushi et al. evaluated the security against differential cryptanalysis and linear cryptanalysis. On the other hand, it has not been reported the security against higher order differential cryptanalysis.
This paper shows a higher order differential of LBC-3. By the computer experiment, we found a new 12-round characteristic using 28-th order differential. Then, we also show a new 18-round characteristic using 60-th order differential which is a 6-round extension of the 12-round one to the direction to plaintext theoretically. By exploiting this characteristic, the full-round LBC-3 can be attacked with $2^{61.6}$ blocks of chosen plaintext and $2^{61.6}$ times of data encryption. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Block Cipher / LBC-3 / Higher Order Differential Property / Cryptanalysis / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 123, no. 129, ISEC2023-47, pp. 214-220, July 2023. |
Paper # |
ISEC2023-47 |
Date of Issue |
2023-07-17 (ISEC, SITE, BioX, HWS, ICSS, EMM) |
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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ISEC2023-47 SITE2023-41 BioX2023-50 HWS2023-47 ICSS2023-44 EMM2023-47 |
Conference Information |
Committee |
EMM BioX ISEC SITE ICSS HWS IPSJ-CSEC IPSJ-SPT |
Conference Date |
2023-07-24 - 2023-07-25 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Hokkaido Jichiro Kaikan |
Topics (in Japanese) |
(See Japanese page) |
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Paper Information |
Registration To |
ISEC |
Conference Code |
2023-07-EMM-BioX-ISEC-SITE-ICSS-HWS-CSEC-SPT |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Higher Order Differential Property of Block Cipher LBC-3 |
Sub Title (in English) |
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Block Cipher |
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LBC-3 |
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Higher Order Differential Property |
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Cryptanalysis |
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1st Author's Name |
Naoki Shibayama |
1st Author's Affiliation |
Tokyo University of Science (Tokyo Univ. of Science) |
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Yasutaka Igarashi |
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Tokyo University of Science (Tokyo Univ. of Science) |
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Speaker |
Author-1 |
Date Time |
2023-07-25 10:00:00 |
Presentation Time |
20 minutes |
Registration for |
ISEC |
Paper # |
ISEC2023-47, SITE2023-41, BioX2023-50, HWS2023-47, ICSS2023-44, EMM2023-47 |
Volume (vol) |
vol.123 |
Number (no) |
no.129(ISEC), no.130(SITE), no.131(BioX), no.132(HWS), no.133(ICSS), no.134(EMM) |
Page |
pp.214-220 |
#Pages |
7 |
Date of Issue |
2023-07-17 (ISEC, SITE, BioX, HWS, ICSS, EMM) |
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