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Paper Abstract and Keywords
Presentation 2023-07-24 17:20
An Identity-based Signature Scheme with Tight Security Reduction
Jiawei Chen, Hyungrok Jo, Shingo Sato, Junji Shikata (YNU) ISEC2023-29 SITE2023-23 BioX2023-32 HWS2023-29 ICSS2023-26 EMM2023-29
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose an identity-based signature (IBS) scheme based on the supersingular isogeny problem, with tightly security reduction. While Shaw and Dutta have proposed a direct construction of isogeny-based IBS as an existing scheme, its security proof is not tight. To address this issue, we utilize a tightly secure isogeny-based signature scheme Lossy CSI-FiSh. We present an IBS scheme based on the Lossy CSI-FiSh scheme and provide a tight security proof for this scheme. Furthermore, we conduct a comparative analysis of key size and signature size for the isogeny-based IBS scheme under suitable parameter settings. The full version of this paper will be appeared in the proceedings of the 14th International Conference on Post-Quantum Cryptography (PQCrypto 2023).
Keyword (in Japanese) (See Japanese page) 
(in English) Post-quantum cryptography / Identity-based signature / Isogeny-based cryptography / / / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 129, ISEC2023-29, pp. 97-104, July 2023.
Paper # ISEC2023-29 
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)
Download PDF ISEC2023-29 SITE2023-23 BioX2023-32 HWS2023-29 ICSS2023-26 EMM2023-29

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) 
Topics (in English)  
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) An Identity-based Signature Scheme with Tight Security Reduction 
Sub Title (in English)  
Keyword(1) Post-quantum cryptography  
Keyword(2) Identity-based signature  
Keyword(3) Isogeny-based cryptography  
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1st Author's Name Jiawei Chen  
1st Author's Affiliation Yokohama National University (YNU)
2nd Author's Name Hyungrok Jo  
2nd Author's Affiliation Yokohama National University (YNU)
3rd Author's Name Shingo Sato  
3rd Author's Affiliation Yokohama National University (YNU)
4th Author's Name Junji Shikata  
4th Author's Affiliation Yokohama National University (YNU)
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Speaker Author-1 
Date Time 2023-07-24 17:20:00 
Presentation Time 20 minutes 
Registration for ISEC 
Paper # ISEC2023-29, SITE2023-23, BioX2023-32, HWS2023-29, ICSS2023-26, EMM2023-29 
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.97-104 
#Pages 8 
Date of Issue 2023-07-17 (ISEC, SITE, BioX, HWS, ICSS, EMM) 

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