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Paper Abstract and Keywords
Presentation 2023-03-14 15:45
Claimable Designated Verifier Signature
Kyosuke Yamashita (Osaka Univ.), Keisuke Hara (AIST/YNU), Yohei Watanabe (UEC/JDC), Naoto Yanai (Osaka Univ./JDC), Junji Shikata (YNU) IT2022-95 ISEC2022-74 WBS2022-92 RCC2022-92
Abstract (in Japanese) (See Japanese page) 
(in English) This paper considers the problem of balancing anonymity and traceablity in group-oriented signature schemes. That is, we propose a claimable designated verifier signature scheme (CDVS) that equips with a functionality that a genuine signer is able to claim the ownership of a signature. Anonymity in DVS is guaranteed by a property named off-the-record, where a designated verifier is able to simulate a signature. However, once a malicious party is designated as a verifier, there might be the case that the verifier forges a signature. We solve this problem by introducing claimability to DVS. We propose two generic construction of CDVS, one is from ring signature, (standard) signature, commitment scheme, and pseudorandom function, and the other is from claimable ring signature.
Keyword (in Japanese) (See Japanese page) 
(in English) designated verifier signature / ring signature / cryptography / anonymity / traceability / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 428, ISEC2022-74, pp. 171-178, March 2023.
Paper # ISEC2022-74 
Date of Issue 2023-03-07 (IT, ISEC, WBS, RCC) 
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 IT2022-95 ISEC2022-74 WBS2022-92 RCC2022-92

Conference Information
Committee RCC ISEC IT WBS  
Conference Date 2023-03-14 - 2023-03-15 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2023-03-RCC-ISEC-IT-WBS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Claimable Designated Verifier Signature 
Sub Title (in English)  
Keyword(1) designated verifier signature  
Keyword(2) ring signature  
Keyword(3) cryptography  
Keyword(4) anonymity  
Keyword(5) traceability  
Keyword(6)  
Keyword(7)  
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1st Author's Name Kyosuke Yamashita  
1st Author's Affiliation Osaka University (Osaka Univ.)
2nd Author's Name Keisuke Hara  
2nd Author's Affiliation National Institute of Advanced Industrial Science and Technology/Yokohama National University (AIST/YNU)
3rd Author's Name Yohei Watanabe  
3rd Author's Affiliation The University of Electro-Communications/Japan Datacom Co., Ltd. (UEC/JDC)
4th Author's Name Naoto Yanai  
4th Author's Affiliation Osaka University/Japan Datacom Co., Ltd. (Osaka Univ./JDC)
5th Author's Name Junji Shikata  
5th Author's Affiliation Yokohama National University (YNU)
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Speaker Author-1 
Date Time 2023-03-14 15:45:00 
Presentation Time 25 minutes 
Registration for ISEC 
Paper # IT2022-95, ISEC2022-74, WBS2022-92, RCC2022-92 
Volume (vol) vol.122 
Number (no) no.427(IT), no.428(ISEC), no.429(WBS), no.430(RCC) 
Page pp.171-178 
#Pages 8 
Date of Issue 2023-03-07 (IT, ISEC, WBS, RCC) 

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