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Paper Abstract and Keywords
Presentation 2025-05-22 12:05
Threshold ECDSA with Robustness
Hikaru Tsuchida (SIT) ISEC2025-7
Abstract (in Japanese) (See Japanese page) 
(in English) ECDSA is a digital signature algorithm standardized in the NIST FIPS 186-5 Digital Signature Standard. In particular, a method for distributed processing of key generation and signature generation in ECDSA by multiple participants is called threshold ECDSA. A representative security notion when processing in a distributed manner by multiple participants is robustness, which ensures that even if an adversary behaves maliciously, the correct calculation results are always output to the honest participants without aborting the protocol. Wong et al. proposed a robust threshold ECDSA (NDSS'24). In this paper, we propose a novel threshold ECDSA that achieves robustness. While our scheme requires the same number of communication rounds as Wong et al.'s scheme, unlike Wong et al.'s scheme, our scheme does not require linearly homomorphic encryption.
Keyword (in Japanese) (See Japanese page) 
(in English) ECDSA / Robustness / Secret sharing / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 30, ISEC2025-7, pp. 21-26, May 2025.
Paper # ISEC2025-7 
Date of Issue 2025-05-15 (ISEC) 
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 ISEC2025-7

Conference Information
Committee ISEC  
Conference Date 2025-05-22 - 2025-05-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2025-05-ISEC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Threshold ECDSA with Robustness 
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Keyword(1) ECDSA  
Keyword(2) Robustness  
Keyword(3) Secret sharing  
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1st Author's Name Hikaru Tsuchida  
1st Author's Affiliation Saitama Institute of Technology (SIT)
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Speaker Author-1 
Date Time 2025-05-22 12:05:00 
Presentation Time 25 minutes 
Registration for ISEC 
Paper # ISEC2025-7 
Volume (vol) vol.125 
Number (no) no.30 
Page pp.21-26 
#Pages 6 
Date of Issue 2025-05-15 (ISEC) 

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