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Paper Abstract and Keywords
Presentation 2023-03-15 13:00
A proposal of an attribute protection scheme in self-sovereign identity systems with shared terminals
Wataru Nakamura, Kenta Takahashi (Hitachi) IT2022-127 ISEC2022-106 WBS2022-124 RCC2022-124
Abstract (in Japanese) (See Japanese page) 
(in English) The concept of Self-Sovereign Identity (SSI), which states that users' identity information should be controlled by themselves, has attracted attention in recent years. For certificates in SSI, it is required that a holder can present necessary parts of them to a necessary verifier in case of necessity. To realize SSI systems available to people who do not have a digital device such as a smartphone, we treat a SSI system in which certificates are stored in an online repository, and presentation is processed with a shared terminal installed at places such as stores. In such a system, based on the SSI concept, attributes contained in the certificate should be hidden from both of the repository and the terminal for presentation. We propose an attribute hiding scheme, which hide the attributes from both of the two entities under the assumption that each entity is semi-honest and there is no collusion by multiple entities. Furthermore, by applying the proposed scheme to an Anonymous Credential System (ACS) by Sanders, we propose an attribute hiding ACS, which can present necessary attributes selectively to verifiers with anonymity and hide the attributes from both of the repository and the terminal for presentation.
Keyword (in Japanese) (See Japanese page) 
(in English) Self-Sovereign Identity (SSI) / confidentiality of attributes / Anonymous Credential System (ACS) / / / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 428, ISEC2022-106, pp. 372-377, March 2023.
Paper # ISEC2022-106 
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 IT2022-127 ISEC2022-106 WBS2022-124 RCC2022-124

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) A proposal of an attribute protection scheme in self-sovereign identity systems with shared terminals 
Sub Title (in English)  
Keyword(1) Self-Sovereign Identity (SSI)  
Keyword(2) confidentiality of attributes  
Keyword(3) Anonymous Credential System (ACS)  
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1st Author's Name Wataru Nakamura  
1st Author's Affiliation Hitachi, Ltd. (Hitachi)
2nd Author's Name Kenta Takahashi  
2nd Author's Affiliation Hitachi, Ltd. (Hitachi)
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Speaker Author-1 
Date Time 2023-03-15 13:00:00 
Presentation Time 25 minutes 
Registration for ISEC 
Paper # IT2022-127, ISEC2022-106, WBS2022-124, RCC2022-124 
Volume (vol) vol.122 
Number (no) no.427(IT), no.428(ISEC), no.429(WBS), no.430(RCC) 
Page pp.372-377 
#Pages 6 
Date of Issue 2023-03-07 (IT, ISEC, WBS, RCC) 

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