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Paper Abstract and Keywords
Presentation 2017-12-21 16:15
Blacklistable Anonymous Credential System with Reputation Using Accumulator
Takeshi Kanatani, Toru Nakanishi (Hiroshima Univ.) ISEC2017-81 COMP2017-35
Abstract (in Japanese) (See Japanese page) 
(in English) Conventional anonymous authentication such as group signature has a problem that the ID administrator can specify the authorized user. As a solution to this problem, anonymous authentication using a blacklist has been proposed. In this method, the user is authenticated without the ID administrator by proving that the past own session IDs are not included in the blacklist. However, since it can only perform a simple evaluation of whether he / she is an illegal or not. If a bad activity is performed, it becomes an illegal user at once. This evaluation does not depend on its degree.

Thus, we propose a reputation-based blacklistable anonymous authentication in this research. The user receives a score from the service provider or other users after the session for his / her activity. When scores in sessions of all users and session IDs of the authenticated user are given, newly constructed accumulator can show "only" the sum of scores of the user. Since each information is compressed in the accumulator, it can be verified efficiently. By incorporating this into the previous scheme, we propose a reputation-based blacklistable anonymous authentication. Additionally, the processing time of authentication is measured by a PC to show the practicality.
Keyword (in Japanese) (See Japanese page) 
(in English) Anonymity / Anonymous Credential / Accumulator / Blacklist / / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 369, ISEC2017-81, pp. 59-65, Dec. 2017.
Paper # ISEC2017-81 
Date of Issue 2017-12-14 (ISEC, COMP) 
ISSN Print edition: ISSN 0913-5685  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. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee ISEC COMP  
Conference Date 2017-12-21 - 2017-12-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Eikokuji Campus, Kochi University of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2017-12-ISEC-COMP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Blacklistable Anonymous Credential System with Reputation Using Accumulator 
Sub Title (in English)  
Keyword(1) Anonymity  
Keyword(2) Anonymous Credential  
Keyword(3) Accumulator  
Keyword(4) Blacklist  
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1st Author's Name Takeshi Kanatani  
1st Author's Affiliation Hiroshima University (Hiroshima Univ.)
2nd Author's Name Toru Nakanishi  
2nd Author's Affiliation Hiroshima University (Hiroshima Univ.)
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Speaker
Date Time 2017-12-21 16:15:00 
Presentation Time 25 
Registration for ISEC 
Paper # IEICE-ISEC2017-81,IEICE-COMP2017-35 
Volume (vol) IEICE-117 
Number (no) no.369(ISEC), no.370(COMP) 
Page pp.59-65 
#Pages IEICE-7 
Date of Issue IEICE-ISEC-2017-12-14,IEICE-COMP-2017-12-14 


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