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Paper Abstract and Keywords
Presentation 2016-01-25 14:00
A Verification Tool for k-Secrecy of XML Databases and Its Optimization
Takatoshi Asai, Kenji Hashimoto, Hiroyuki Seki (Nagoya Univ.) MSS2015-43 SS2015-52
Abstract (in Japanese) (See Japanese page) 
(in English) An inference attack is a malicious way to obtain the result of an unauthorized query
by combining the database schema, the results of the authorized queries and the code
(meaning) of the queries.
A database instance is $k$-secret if an attacker cannot narrow down the candidates
of the results of the unauthorized query to less than $k$.
We already proposed a method of deciding a sufficient condition of $k$-secrecy
by reducing the problem to a model counting problem for the propositional logic.
This paper proposes an improvement of our previous verification method by incorporating the information on a schema and queries to reduce the size of a generated formula.
We show the effectiveness of the proposed optimization based on the experimental results obtained by our verification tool.
Keyword (in Japanese) (See Japanese page) 
(in English) $k$-secrecy / XML database / tree transducer / model counting / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 420, SS2015-52, pp. 47-52, Jan. 2016.
Paper # SS2015-52 
Date of Issue 2016-01-18 (MSS, SS) 
ISSN Print edition: ISSN 0913-5685  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)
Download PDF MSS2015-43 SS2015-52

Conference Information
Committee SS MSS  
Conference Date 2016-01-25 - 2016-01-26 
Place (in Japanese) (See Japanese page) 
Place (in English) Shiinoki-Geihin-Kan 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SS 
Conference Code 2016-01-SS-MSS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Verification Tool for k-Secrecy of XML Databases and Its Optimization 
Sub Title (in English)  
Keyword(1) $k$-secrecy  
Keyword(2) XML database  
Keyword(3) tree transducer  
Keyword(4) model counting  
1st Author's Name Takatoshi Asai  
1st Author's Affiliation Nagoya University (Nagoya Univ.)
2nd Author's Name Kenji Hashimoto  
2nd Author's Affiliation Nagoya University (Nagoya Univ.)
3rd Author's Name Hiroyuki Seki  
3rd Author's Affiliation Nagoya University (Nagoya Univ.)
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Speaker Author-1 
Date Time 2016-01-25 14:00:00 
Presentation Time 25 minutes 
Registration for SS 
Paper # MSS2015-43, SS2015-52 
Volume (vol) vol.115 
Number (no) no.419(MSS), no.420(SS) 
Page pp.47-52 
Date of Issue 2016-01-18 (MSS, SS) 

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