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Paper Abstract and Keywords
Presentation 2026-06-12 10:10
Reducing Lookup Latency in IPFS Using Route Caching and Pinning
Kana Fukuoka, Noriaki Kamiyama (Ritsumeikan Univ.) NLP2026-16 CCS2026-16
Abstract (in Japanese) (See Japanese page) 
(in English) In recent years, IPFS (InterPlanetary File System) has garnered significant attention as a foundational technology for a decentralized web that does not rely on centralized servers. IPFS is a system in which peers on a P2P network communicate autonomously and efficiently retrieve and share data through content-based addressing; it is expected to serve as an infrastructure that offers superior fault tolerance and censorship resistance compared to traditional HTTP. However, content discovery in IPFS relies on iterative queries using a Distributed Hash Table (DHT) based on the Kademlia protocol, which poses the challenge of significant delays in locating the peer that holds the desired content. Specifically, as the network scales, the number of hops required for discovery increases at a rate of $O(log N)$. Additionally, frequent node join and leave events cause timeouts during the discovery process, further contributing to increased discovery latency.

Therefore, this paper proposes a method that combines the “path caching function” of Provider Records (PRs) with a “pinning function” using dedicated peers, with the aim of reducing DHT discovery latency. This method applies early discovery via path caching to highly popular content and pinning using dedicated peers that are always online to moderately popular content, thereby preventing re-searches caused by peer disconnections. Simulation results show a reduction in the average number of search hops, with significant improvements observed particularly for moderately popular content. Furthermore, we demonstrate that even in high-churn environments, the two functions complement each other and are effective in reducing search delay.
Keyword (in Japanese) (See Japanese page) 
(in English) IPFS / caching / pinning / / / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 69, CCS2026-16, pp. 81-86, June 2026.
Paper # CCS2026-16 
Date of Issue 2026-06-04 (NLP, CCS) 
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 NLP2026-16 CCS2026-16

Conference Information
Committee CCS NLP  
Conference Date 2026-06-11 - 2026-06-12 
Place (in Japanese) (See Japanese page) 
Place (in English) I-site Namba 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Nonlinear Problems, Complex Communication Sciences, etc. 
Paper Information
Registration To CCS 
Conference Code 2026-06-CCS-NLP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Reducing Lookup Latency in IPFS Using Route Caching and Pinning 
Sub Title (in English)  
Keyword(1) IPFS  
Keyword(2) caching  
Keyword(3) pinning  
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1st Author's Name Kana Fukuoka  
1st Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
2nd Author's Name Noriaki Kamiyama  
2nd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
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Speaker Author-1 
Date Time 2026-06-12 10:10:00 
Presentation Time 25 minutes 
Registration for CCS 
Paper # NLP2026-16, CCS2026-16 
Volume (vol) vol.126 
Number (no) no.68(NLP), no.69(CCS) 
Page pp.81-86 
#Pages 6 
Date of Issue 2026-06-04 (NLP, CCS) 

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