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Paper Abstract and Keywords
Presentation 2019-11-02 10:00
Evolving Secret Sharing: Hierarchical Access Structure with Polynomial Share Size
Sabyasachi Dutta (Univ. of Calgary), Partha Sarathi Roy, Kazuhide Fukushima, Shinsaku Kiyomoto (KDDI Research), Kouichi Sakurai (Kyushu Univ.) ISEC2019-76 SITE2019-70 LOIS2019-35
Abstract (in Japanese) (See Japanese page) 
(in English) Secret sharing allows storing secret information in a distributed manner among several participants.
The original setting of secret sharing schemes assumes that the total number of participants does not change from the very beginning. However, we need to consider the scenario where any time a new participant can join, and the total number of participants is (possibly) unbounded. Evolving secret sharing solves the problem, and secret sharing for evolving threshold access structure has been considered in the last few years. In this paper, we study multi-level access structures, and more specifically, evolving compartmental and hierarchical access structures. We provide concrete constructions with the estimation of share sizes.
Keyword (in Japanese) (See Japanese page) 
(in English) Evolving Access Structure / compartmental access structure / hierarchical access structure / information theoretic security / / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 257, ISEC2019-76, pp. 93-98, Nov. 2019.
Paper # ISEC2019-76 
Date of Issue 2019-10-25 (ISEC, SITE, LOIS) 
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 ISEC SITE LOIS  
Conference Date 2019-11-01 - 2019-11-02 
Place (in Japanese) (See Japanese page) 
Place (in English) Osaka Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2019-11-ISEC-SITE-LOIS 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evolving Secret Sharing: Hierarchical Access Structure with Polynomial Share Size 
Sub Title (in English)  
Keyword(1) Evolving Access Structure  
Keyword(2) compartmental access structure  
Keyword(3) hierarchical access structure  
Keyword(4) information theoretic security  
1st Author's Name Sabyasachi Dutta  
1st Author's Affiliation University of Calgary (Univ. of Calgary)
2nd Author's Name Partha Sarathi Roy  
2nd Author's Affiliation KDDI Research Laboratory (KDDI Research)
3rd Author's Name Kazuhide Fukushima  
3rd Author's Affiliation KDDI Research Laboratory (KDDI Research)
4th Author's Name Shinsaku Kiyomoto  
4th Author's Affiliation KDDI Research Laboratory (KDDI Research)
5th Author's Name Kouichi Sakurai  
5th Author's Affiliation Kyushu University (Kyushu Univ.)
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Speaker Author-5 
Date Time 2019-11-02 10:00:00 
Presentation Time 25 minutes 
Registration for ISEC 
Paper # ISEC2019-76, SITE2019-70, LOIS2019-35 
Volume (vol) vol.119 
Number (no) no.257(ISEC), no.258(SITE), no.259(LOIS) 
Page pp.93-98 
Date of Issue 2019-10-25 (ISEC, SITE, LOIS) 

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