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Paper Abstract and Keywords
Presentation 2025-11-07 10:15
Blockchain Consensus Building Method to Prevent Fraudulent MEV
Kiyora Kodama, Takeshi Ogawa (TDU) NS2025-144
Abstract (in Japanese) (See Japanese page) 
(in English) In existing blockchains, the contents of transactions (hereinafter referred to as Tx) are disclosed in cleartext before their reflection on the ledger is finalized. For this reason, nodes that propose blocks can refer to those contents and perform actions such as inserting or excluding fraudulent Txs to gain unfair profits, which has become a major problem known as fraudulent maximal extractable value (MEV). In existing countermeasures such as PBS and Shutter Network, problems have been pointed out, including insufficient protection for transaction originators and the dependence of transaction execution reliability on specific nodes. This paper proposes a method that resolves all of these problems through a simple mechanism. Specifically, by using newly defined reservation transactions (Re-Tx), the order in which transactions are executed is determined in advance, and subsequently, the Tx (RE-Tx) containing the transaction contents is disclosed in cleartext to prevent insertion attacks. If a block-proposing node intentionally excludes the corresponding RE-Tx from a block, the proposed method prevents unfair exclusion by allowing the rescue of the RE-Tx during the voting process for block approval. The proposed method minimizes the increase in node computational load and message data volume, and can prevent fraudulent MEVs without degrading the performance or consensus security of the blockchain. Quantitative evaluation results of these characteristics are also presented to demonstrate the effectiveness of the proposed method.
Keyword (in Japanese) (See Japanese page) 
(in English) Blockchain / MEV / Consensus Building / VRF / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 225, NS2025-144, pp. 79-86, Nov. 2025.
Paper # NS2025-144 
Date of Issue 2025-10-30 (NS) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
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)
Download PDF NS2025-144

Conference Information
Committee ICM NS NV  
Conference Date 2025-11-06 - 2025-11-07 
Place (in Japanese) (See Japanese page) 
Place (in English) Daisan-Hakata-Kaisei Bldg. + Online 
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 NS 
Conference Code 2025-11-ICM-NS-NV 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Blockchain Consensus Building Method to Prevent Fraudulent MEV 
Sub Title (in English)  
Keyword(1) Blockchain  
Keyword(2) MEV  
Keyword(3) Consensus Building  
Keyword(4) VRF  
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1st Author's Name Kiyora Kodama  
1st Author's Affiliation Tokyo Denki University (TDU)
2nd Author's Name Takeshi Ogawa  
2nd Author's Affiliation Tokyo Denki University (TDU)
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Speaker Author-1 
Date Time 2025-11-07 10:15:00 
Presentation Time 25 minutes 
Registration for NS 
Paper # NS2025-144 
Volume (vol) vol.125 
Number (no) no.225 
Page pp.79-86 
#Pages 8 
Date of Issue 2025-10-30 (NS) 

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