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Paper Abstract and Keywords
Presentation 2021-03-05 11:45
A Proposal of Decentralized Multi-authority Traceable Anonymous Credential Scheme and Its Generic Construction
Hiroaki Anada (Univ. of Nagasaki) IT2020-149 ISEC2020-79 WBS2020-68
Abstract (in Japanese) (See Japanese page) 
(in English) We propose an anonymous credential scheme and its generic construction, where there are independent decentralized multi-authorities which issue attribute credentials. A feature is that the authorities are capable of tracing users who generate proofs for their attribute keys. The syntax, security definitions and a generic construction are based on those of the dynamic group signature scheme due to Bellare et al. (CT-RSA 2005). That is, the building blocks of the generic construction are a digital signature scheme, a public-key encryption scheme and a non-interactive zero-knowledge proof system. Security properties are based on existential unforgeability against chosen-message attacks, indistinguishability against chosen-ciphertext attacks and computational zero-knowledge and simulation-soundness. %The construction is by employing a dynamic group signature scheme. %The security is reduced in the random oracle model to the security of the building blocks. Finally, we mention an instantiation in the lattice structure having the hardness of the Ring Short Integer Solution (RSIS) and the Ring Learning With Errors (RLWE) problems.
Keyword (in Japanese) (See Japanese page) 
(in English) anonymous credential scheme / attribute-based / traceable / dynamic group signature / lattice / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 411, ISEC2020-79, pp. 225-231, March 2021.
Paper # ISEC2020-79 
Date of Issue 2021-02-25 (IT, ISEC, WBS) 
ISSN Online edition: ISSN 2432-6380
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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 IT2020-149 ISEC2020-79 WBS2020-68

Conference Information
Committee WBS IT ISEC  
Conference Date 2021-03-04 - 2021-03-05 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Joint Meeting of WBS, IT, and ISEC 
Paper Information
Registration To ISEC 
Conference Code 2021-03-WBS-IT-ISEC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Proposal of Decentralized Multi-authority Traceable Anonymous Credential Scheme and Its Generic Construction 
Sub Title (in English)  
Keyword(1) anonymous credential scheme  
Keyword(2) attribute-based  
Keyword(3) traceable  
Keyword(4) dynamic group signature  
Keyword(5) lattice  
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1st Author's Name Hiroaki Anada  
1st Author's Affiliation University of Nagasaki (Univ. of Nagasaki)
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Speaker Author-1 
Date Time 2021-03-05 11:45:00 
Presentation Time 25 minutes 
Registration for ISEC 
Paper # IT2020-149, ISEC2020-79, WBS2020-68 
Volume (vol) vol.120 
Number (no) no.410(IT), no.411(ISEC), no.412(WBS) 
Page pp.225-231 
#Pages
Date of Issue 2021-02-25 (IT, ISEC, WBS) 


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