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Paper Abstract and Keywords
Presentation 2022-11-18 15:55
Token-Controlled Token Circulation
Ko Fujimura (Otsuma Univ.) ISEC2022-42 SITE2022-46 LOIS2022-26
Abstract (in Japanese) (See Japanese page) 
(in English) This paper presents a general-purpose token circulating system for circulating various types of rights such as tickets, vouchers, coupons, and licenses as tokens on the blockchain. The circulation of token comprises three types of principal transactions: issuance, transfer, and redemption. Depending on the application, various conditions must be satisfied to execute these transactions, e.g., only qualified shops can issue the tokens and only a certain agent can transfer the tokens. The token circulating system issues, transfers, or redeems a token only if the control tokens are owned by the participants of the transaction. The circulation control token themselves can be any type of token, e.g., a driver's license or a membership certificate to a certain group, and recursively circulated in the token circulating system. This scheme eliminates the need to write complex circulation control in smart contract for each application, improving the security of the system and reducing development costs. The idea of using tokens for token circulation was already presented in a paper by the authors in 1999, but with the spread of modern smart contracts and token wallets, it has become a practical and feasible technology. This paper presents the implementation techniques on the smart contract and its merits.
Keyword (in Japanese) (See Japanese page) 
(in English) NFT / Blockchain / Token / Smart contract / Solidity / Access control / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 260, LOIS2022-26, pp. 73-78, Nov. 2022.
Paper # LOIS2022-26 
Date of Issue 2022-11-11 (ISEC, SITE, LOIS) 
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 ISEC SITE LOIS  
Conference Date 2022-11-18 - 2022-11-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To LOIS 
Conference Code 2022-11-ISEC-SITE-LOIS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Token-Controlled Token Circulation 
Sub Title (in English)  
Keyword(1) NFT  
Keyword(2) Blockchain  
Keyword(3) Token  
Keyword(4) Smart contract  
Keyword(5) Solidity  
Keyword(6) Access control  
1st Author's Name Ko Fujimura  
1st Author's Affiliation Otsuma Women's University (Otsuma Univ.)
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Speaker Author-1 
Date Time 2022-11-18 15:55:00 
Presentation Time 25 minutes 
Registration for LOIS 
Paper # ISEC2022-42, SITE2022-46, LOIS2022-26 
Volume (vol) vol.122 
Number (no) no.258(ISEC), no.259(SITE), no.260(LOIS) 
Page pp.73-78 
Date of Issue 2022-11-11 (ISEC, SITE, LOIS) 

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