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Paper Abstract and Keywords
Presentation 2016-11-09 13:35
Design of a Threshold-based Authentication System Which Provides Attributes Using Secret Sharing
Tomohiro Ito, Daisuke Kotani, Yasuo Okabe (Kyoto Univ.) IA2016-57
Abstract (in Japanese) (See Japanese page) 
(in English) In identity federation, each service provider verifies the identity of a user based on authentication performed by an authentication server called an Identity Provider (IdP). When the IdP suffer troubles like an unauthorized person has cracked into the IdP or the IdP is unreachable due to a network problem, all services in the federation are affected by them. Simple replication of servers for the IdP causes privacy concern because raw attribute values of users must be copied to many servers, including some servers that may not be fully trusted. In order to maintain the function as an IdP even under such troubles, we propose a system in which servers of the IdP are distributed and cooperate using threshold-based authentication and secret sharing. In this paper, we design the system from the viewpoint of management of attribute values so that an administrator of the IdP can update the values anytime while keeping consistency of attribute values among the servers in the IdP.
Keyword (in Japanese) (See Japanese page) 
(in English) Attributes / Secret Sharing / Threshold-based Authentication / / / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 292, IA2016-57, pp. 7-12, Nov. 2016.
Paper # IA2016-57 
Date of Issue 2016-11-02 (IA) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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)
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Conference Information
Committee IA  
Conference Date 2016-11-09 - 2016-11-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Onuma International Seminar Hous 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Student Sessions, etc. (cosponsored by JSPS 163rd Committee on Internet Technology) 
Paper Information
Registration To IA 
Conference Code 2016-11-IA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Design of a Threshold-based Authentication System Which Provides Attributes Using Secret Sharing 
Sub Title (in English)  
Keyword(1) Attributes  
Keyword(2) Secret Sharing  
Keyword(3) Threshold-based Authentication  
1st Author's Name Tomohiro Ito  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Daisuke Kotani  
2nd Author's Affiliation Kyoto University (Kyoto Univ.)
3rd Author's Name Yasuo Okabe  
3rd Author's Affiliation Kyoto University (Kyoto Univ.)
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Speaker Author-1 
Date Time 2016-11-09 13:35:00 
Presentation Time 25 minutes 
Registration for IA 
Paper # IA2016-57 
Volume (vol) vol.116 
Number (no) no.292 
Page pp.7-12 
Date of Issue 2016-11-02 (IA) 

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