Information: Join today and make your research activities more affordable! Technical workshop participation fees and annual registration fees are available at member rates.
Notice: [Important] Announcement of Changes to Registration Fee Payment and Manuscript Upload Procedures for IEICE Technical Meetings
IEICE Technical Committee Submission System
Conference Paper's Information		 Online Proceedings
[Sign in]
Tech. Rep. Archives
 Go Top Page Go Previous   [Japanese] / [English] 

Paper Abstract and Keywords
Presentation 2026-07-13 10:40
Utilizing Search Patterns to Improve Query Recovery Attacks against Searchable Encryption
Ryousuke Muramatsu (FUN), Takumi Namiki (UEC), Yohei Watanabe (UEC/AIST) ISEC2026-13 SITE2026-9 BioX2026-36 HWS2026-9 ICSS2026-28 EMM2026-20
Abstract (in Japanese) (See Japanese page) 
(in English) Searchable Encryption (SE) securely enables keyword search over encrypted documents stored in (outsourced) database systems, without leaking any information about the searched keywords or documents. A unique feature of SE is that it allows inconsequential leakage, i.e., leakage of information considered acceptable to disclose, to support efficient search functionality. Although SE guarantees that no information beyond the predetermined acceptable leakage occurs, the practical impact of the acceptable leakage must be carefully analyzed. The line of research on leakage abuse attacks takes that part.
If a certain leakage would help to succeed in leakage abuse attacks, the leakage should be avoided from being disclosed. The SimGraphVL attack is one of the state-of-the-art leakage abuse attacks proposed by Namili et al. (ESORICS 2025). In this paper, we improve the SimGraphVL attack by leveraging search patterns, which are one of the standard acceptable leakage profiles, and propose a new leakage abuse attack called the SimGraph+VL attack. We demonstrate experimentally that our attack recovers more search queries than the SimGraphVL attack.
Keyword (in Japanese) (See Japanese page) 
(in English) Searchable Encryption / Encrypted Search / Leakage Abuse Attacks / / / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 107, ISEC2026-13, pp. 9-16, July 2026.
Paper # ISEC2026-13 
Date of Issue 2026-07-06 (ISEC, SITE, BioX, HWS, ICSS, EMM) 
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 ISEC2026-13 SITE2026-9 BioX2026-36 HWS2026-9 ICSS2026-28 EMM2026-20

Conference Information
Committee BioX HWS ISEC SITE ICSS EMM IPSJ-CSEC IPSJ-SPT 
Conference Date 2026-07-13 - 2026-07-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Sapporo Convention Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2026-07-BioX-HWS-ISEC-SITE-ICSS-EMM-CSEC-SPT-SEC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Utilizing Search Patterns to Improve Query Recovery Attacks against Searchable Encryption 
Sub Title (in English)  
Keyword(1) Searchable Encryption  
Keyword(2) Encrypted Search  
Keyword(3) Leakage Abuse Attacks  
Keyword(4)  
Keyword(5)  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Ryousuke Muramatsu  
1st Author's Affiliation Future University Hakodate (FUN)
2nd Author's Name Takumi Namiki  
2nd Author's Affiliation The University of Electro-Communications (UEC)
3rd Author's Name Yohei Watanabe  
3rd Author's Affiliation The University of Electro-Communications/National Institute of Advanced Industrial Science and Technology (UEC/AIST)
4th Author's Name  
4th Author's Affiliation ()
5th Author's Name  
5th Author's Affiliation ()
6th Author's Name  
6th Author's Affiliation ()
7th Author's Name  
7th Author's Affiliation ()
8th Author's Name  
8th Author's Affiliation ()
9th Author's Name  
9th Author's Affiliation ()
10th Author's Name  
10th Author's Affiliation ()
11th Author's Name  
11th Author's Affiliation ()
12th Author's Name  
12th Author's Affiliation ()
13th Author's Name  
13th Author's Affiliation ()
14th Author's Name  
14th Author's Affiliation ()
15th Author's Name  
15th Author's Affiliation ()
16th Author's Name  
16th Author's Affiliation ()
17th Author's Name  
17th Author's Affiliation ()
18th Author's Name  
18th Author's Affiliation ()
19th Author's Name  
19th Author's Affiliation ()
20th Author's Name  
20th Author's Affiliation ()
21st Author's Name  
21st Author's Affiliation ()
22nd Author's Name  
22nd Author's Affiliation ()
23rd Author's Name  
23rd Author's Affiliation ()
24th Author's Name  
24th Author's Affiliation ()
25th Author's Name  
25th Author's Affiliation ()
26th Author's Name / /
26th Author's Affiliation ()
()
27th Author's Name / /
27th Author's Affiliation ()
()
28th Author's Name / /
28th Author's Affiliation ()
()
29th Author's Name / /
29th Author's Affiliation ()
()
30th Author's Name / /
30th Author's Affiliation ()
()
31st Author's Name / /
31st Author's Affiliation ()
()
32nd Author's Name / /
32nd Author's Affiliation ()
()
33rd Author's Name / /
33rd Author's Affiliation ()
()
34th Author's Name / /
34th Author's Affiliation ()
()
35th Author's Name / /
35th Author's Affiliation ()
()
36th Author's Name / /
36th Author's Affiliation ()
()
Speaker Author-1 
Date Time 2026-07-13 10:40:00 
Presentation Time 25 minutes 
Registration for ISEC 
Paper # ISEC2026-13, SITE2026-9, BioX2026-36, HWS2026-9, ICSS2026-28, EMM2026-20 
Volume (vol) vol.126 
Number (no) no.107(ISEC), no.108(SITE), no.109(BioX), no.110(HWS), no.111(ICSS), no.112(EMM) 
Page pp.9-16 
#Pages 8 
Date of Issue 2026-07-06 (ISEC, SITE, BioX, HWS, ICSS, EMM) 

[Return to Top Page]

[Return to IEICE Web Page]
The Institute of Electronics, Information and Communication Engineers (IEICE), Japan