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Paper Abstract and Keywords
Presentation 2024-07-22 14:50
Collision Attack on DM-AES
Kodai Taiyama (UOH), Kosei Sakamoto (ME), Ryoma Ito (NICT), Kazuma Taka, Takanori Isobe (UOH) ISEC2024-19 SITE2024-16 BioX2024-29 HWS2024-19 ICSS2024-23 EMM2024-25
Abstract (in Japanese) (See Japanese page) 
(in English) AES-DM is a hashing mode used to construct a cryptographic hash function from AES. There are numerous results of free-start collision, which introduces differences in the initialization vector. However, collision and semi-free-start collision attacks have not yet been investigated for AES, which are directly related to the security of hash functions. Under these conditions, differences cannot be inserted into the initialization vector, so it is necessary to cause collisions using only message differences. This makes finding appropriate differential paths and controlling internal states extremely difficult. In this study, we introduce collision and semi-free-start collision attacks on AES-256-DM, a hashing mode of AES. Specifically, we explore bit-level differential paths where differences are inserted solely into the key of AES using a SAT solver. Additionally, we apply a rebound attack, an effective method against AES-based hash functions. As a result, we show the 6-round collision attak and 9-round semi-free-start collision attack. Furthermore, we show a collision pair for 9-round AES-256-DM for the evaluation results under the semi-free-start condition.
Keyword (in Japanese) (See Japanese page) 
(in English) AES / Davies-Meyer hashing mode / collision attack / rebound attack / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 120, ISEC2024-19, pp. 73-80, July 2024.
Paper # ISEC2024-19 
Date of Issue 2024-07-15 (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)
Download PDF ISEC2024-19 SITE2024-16 BioX2024-29 HWS2024-19 ICSS2024-23 EMM2024-25

Conference Information
Committee EMM BioX ISEC SITE ICSS HWS IPSJ-CSEC IPSJ-SPT 
Conference Date 2024-07-22 - 2024-07-23 
Place (in Japanese) (See Japanese page) 
Place (in English) Sapporo Convention Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2024-07-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) Collision Attack on DM-AES 
Sub Title (in English)  
Keyword(1) AES  
Keyword(2) Davies-Meyer hashing mode  
Keyword(3) collision attack  
Keyword(4) rebound attack  
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1st Author's Name Kodai Taiyama  
1st Author's Affiliation University of Hyogo (UOH)
2nd Author's Name Kosei Sakamoto  
2nd Author's Affiliation Mitsubishi Electric Corporation (ME)
3rd Author's Name Ryoma Ito  
3rd Author's Affiliation National Institute of Information and Communications Technology (NICT)
4th Author's Name Kazuma Taka  
4th Author's Affiliation University of Hyogo (UOH)
5th Author's Name Takanori Isobe  
5th Author's Affiliation University of Hyogo (UOH)
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Speaker Author-1 
Date Time 2024-07-22 14:50:00 
Presentation Time 25 minutes 
Registration for ISEC 
Paper # ISEC2024-19, SITE2024-16, BioX2024-29, HWS2024-19, ICSS2024-23, EMM2024-25 
Volume (vol) vol.124 
Number (no) no.120(ISEC), no.121(SITE), no.122(BioX), no.123(HWS), no.124(ICSS), no.125(EMM) 
Page pp.73-80 
#Pages 8 
Date of Issue 2024-07-15 (ISEC, SITE, BioX, HWS, ICSS, EMM) 

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