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Paper Abstract and Keywords
Presentation 2021-11-26 14:50
Data privacy protection method for blockchain by using secret sharing
Jun Nakajima (Hitachi) ICM2021-27
Abstract (in Japanese) (See Japanese page) 
(in English) As a form of blockchain(BC), permission-type BC that forms a BC network between specific organizations is attracting attention as a promising technology in the enterprise field. When sharing data in a permission-type BC, there are cases where an organization don't want to show the data to some of the other organizations. Permission-type BC participating organizations include organizations that own BC server and builds and operates BC services (own-type org) and organizations that don't have BC server and information with tamper-resistance and shares information across organizations (join-type org).
BC platform provides a data concealment function for own-type org by controlling the data sharing range for each server, but the function is not provided for join-type org. For this reason, due to the risk of unauthorized access and peeping, join-type org cannot use the BC service safely and securely. In this research, a private area is prepared for each BC server by controlling the data sharing range for each server, and it is proposed that makes data concealable by storing fragments of data decomposed using
secret sharing in the private area.
Keyword (in Japanese) (See Japanese page) 
(in English) Blockchain / Secret Sharing / Security / Smart Contract / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 264, ICM2021-27, pp. 21-26, Nov. 2021.
Paper # ICM2021-27 
Date of Issue 2021-11-18 (ICM) 
ISSN Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee CQ ICM NS NV  
Conference Date 2021-11-25 - 2021-11-26 
Place (in Japanese) (See Japanese page) 
Place (in English) JR Hakata Stn. Hakata EkiHigashi Rental Room 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Network quality, Network measurement/management, Network virtualization, Network service, Blockchain, Security, Network intelligence/AI, etc. 
Paper Information
Registration To ICM 
Conference Code 2021-11-CQ-ICM-NS-NV 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Data privacy protection method for blockchain by using secret sharing 
Sub Title (in English)  
Keyword(1) Blockchain  
Keyword(2) Secret Sharing  
Keyword(3) Security  
Keyword(4) Smart Contract  
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1st Author's Name Jun Nakajima  
1st Author's Affiliation Hitachi, Ltd. (Hitachi)
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Speaker Author-1 
Date Time 2021-11-26 14:50:00 
Presentation Time 25 minutes 
Registration for ICM 
Paper # ICM2021-27 
Volume (vol) vol.121 
Number (no) no.264 
Page pp.21-26 
#Pages
Date of Issue 2021-11-18 (ICM) 


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