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Paper Abstract and Keywords
Presentation 2019-03-07 09:00
[Encouragement Talk] Operational-Flow Smart-Contract to Support Inter-Organizational Cooparative System Operations for Permissioned Blockchain
Tatsuya Sato, Yosuke Himura, Jun Nemoto (Hitachi) ICM2018-49
Abstract (in Japanese) (See Japanese page) 
(in English) Enterprises have paid attention to permissioned blockchain (BC), where business transactions among inter-authorized organizations (forming a consortium) can automatically be executed on the basis of a distributed consensus protocol. The BC has adopted the features of the smart contract (SC), which is programmable user-defined business logic deployed in BC and executed with the consensus protocol. A single BC-based system will be built across multiple management domains (e.g., data centers of each organization) having different operational policies; this will trigger a problem that its system operations (e.g., SC updates, taking snapshots) will become costly due to the difficulty in unifying and/or adjusting operational policy such as procedures, timing, etc., among management domains. To solve the problem, we have developed an operations execution method for BC systems; a primary idea is to define operations as SC (called operational SC) so that unified and synchronized cross-organizational operations can be executed effectively by using BC-native features. The method on the previous reports could only support typical operations which are executed in all organizations in parallel. However, actual cases require to perform more cooperative operations while sharing/exchanging information between organizations and nodes (e.g., organizations take turns executing a command). In this research, first we extracted cooperative operations patterns among inter-organizations. As the result, we listed up four operations of be executed (1) only by specific organizations, (2) waiting for previous tasks to end, (3) executed while switching organizations and (4) executed while sharing/exchanging information. Then, we designed new operational SC (named “operational-flow SC”) which supports their cooperative operations and implemented the prototype using Hyperledger Fabric. We also estimated the introduction effect of the operational-flow SC in the typical operations of SC updates.
Keyword (in Japanese) (See Japanese page) 
(in English) Permissioned Blockchain / Operations Management / Smart Contract / Hyperledger Fabric / / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 483, ICM2018-49, pp. 1-6, March 2019.
Paper # ICM2018-49 
Date of Issue 2019-02-28 (ICM) 
ISSN 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 ICM  
Conference Date 2019-03-07 - 2019-03-08 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ICM 
Conference Code 2019-03-ICM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Operational-Flow Smart-Contract to Support Inter-Organizational Cooparative System Operations for Permissioned Blockchain 
Sub Title (in English)  
Keyword(1) Permissioned Blockchain  
Keyword(2) Operations Management  
Keyword(3) Smart Contract  
Keyword(4) Hyperledger Fabric  
1st Author's Name Tatsuya Sato  
1st Author's Affiliation Hitachi, Ltd. (Hitachi)
2nd Author's Name Yosuke Himura  
2nd Author's Affiliation Hitachi, Ltd. (Hitachi)
3rd Author's Name Jun Nemoto  
3rd Author's Affiliation Hitachi, Ltd. (Hitachi)
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Speaker Author-1 
Date Time 2019-03-07 09:00:00 
Presentation Time 20 minutes 
Registration for ICM 
Paper # ICM2018-49 
Volume (vol) vol.118 
Number (no) no.483 
Page pp.1-6 
Date of Issue 2019-02-28 (ICM) 

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