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Paper Abstract and Keywords
Presentation 2026-03-05 10:10
Data Analysis and Visualization of DNS Water Torture Attacks
Toshiaki Tanimura, Tsunehiko Suzuki (Chukyo Univ) NS2025-298
Abstract (in Japanese) (See Japanese page) 
(in English) A DNS water torture attack is a technique that degrades the overall availability of DNS services by generating a large number of non-existent subdomain names and continuously querying authoritative DNS servers, thereby disabling the caching function of caching DNS servers. In this study, we analyzed the characteristics of attack traffic using log data of DNS water torture attacks collected from an open resolver operated as a honeypot, and constructed a system to store the data in a relational database. Furthermore, we developed and publicly released a web application for data analysis, implementing visualization features such as time-series graphs, heat maps, and data tables.
Analysis of more than 100 million records collected over approximately one month revealed that 77% of the attacks were automated, occurring at intervals of less than one second; that 60% of the source IP addresses targeted only a single domain, while 12.4% attacked six or more domains, indicating a multi-target attack pattern; that organized attack behaviors were observed, including concentrated attacks on seven Japanese energy-related companies and attacks against multiple domains from specific subnets; and that hosting services in Europe—such as those in Germany, Bulgaria, and the United Kingdom—were being abused as attack infrastructures.
Keyword (in Japanese) (See Japanese page) 
(in English) DNS Water Torture Attack / Open Resolver / Log Analysis / Visualization / Security / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 385, NS2025-298, pp. 456-461, March 2026.
Paper # NS2025-298 
Date of Issue 2026-02-25 (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 NS2025-298

Conference Information
Committee IN NS  
Conference Date 2026-03-04 - 2026-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa-Ken Shichoson Jichi Kaikan 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To NS 
Conference Code 2026-03-IN-NS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Data Analysis and Visualization of DNS Water Torture Attacks 
Sub Title (in English) * 
Keyword(1) DNS Water Torture Attack  
Keyword(2) Open Resolver  
Keyword(3) Log Analysis  
Keyword(4) Visualization  
Keyword(5) Security  
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1st Author's Name Toshiaki Tanimura  
1st Author's Affiliation Chukyo University (Chukyo Univ)
2nd Author's Name Tsunehiko Suzuki  
2nd Author's Affiliation Chukyo University (Chukyo Univ)
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Speaker Author-1 
Date Time 2026-03-05 10:10:00 
Presentation Time 25 minutes 
Registration for NS 
Paper # NS2025-298 
Volume (vol) vol.125 
Number (no) no.385 
Page pp.456-461 
#Pages 6 
Date of Issue 2026-02-25 (NS) 

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