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Paper Abstract and Keywords
Presentation 2010-11-17 15:15
Similarity Hashing resistant to file modifications
Susumu Serita, Yasuhiro Fujii, Satoshi Kai, Takao Murakami, Yoshinori Honda (Hitachi, Ltd.) ISEC2010-54 LOIS2010-33
Abstract (in Japanese) (See Japanese page) 
(in English) Similar files in PCs and servers need to be identified quickly and accurately, and this can be done by using similarity hashing to extract feature values of files. Whereas the cryptographic hashes of two files differing by even a single bit are drastically different, the similarity hashes of files with small modifications do not differ much. With conventional similarity hashing methods, however, the accuracy with which modified files are recognized to be similar decreases when the modifications change the file size. In this paper we discuss an improved similarity hashing method that can accurately identify similar files whose sizes differ. Experimental results show that the true positive rate obtained using the improved method is 22.5% higher than that obtained using a conventional method.
Keyword (in Japanese) (See Japanese page) 
(in English) similarity hashing / fuzzy hashing / digital forensic / / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 281, ISEC2010-54, pp. 31-36, Nov. 2010.
Paper # ISEC2010-54 
Date of Issue 2010-11-10 (ISEC, LOIS) 
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)
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Conference Information
Committee ISEC LOIS  
Conference Date 2010-11-17 - 2010-11-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Tsukuba Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2010-11-ISEC-LOIS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Similarity Hashing resistant to file modifications 
Sub Title (in English)  
Keyword(1) similarity hashing  
Keyword(2) fuzzy hashing  
Keyword(3) digital forensic  
1st Author's Name Susumu Serita  
1st Author's Affiliation Hitachi, Ltd.,System Development, Lab. (Hitachi, Ltd.)
2nd Author's Name Yasuhiro Fujii  
2nd Author's Affiliation Hitachi, Ltd.,System Development, Lab. (Hitachi, Ltd.)
3rd Author's Name Satoshi Kai  
3rd Author's Affiliation Hitachi, Ltd.,System Development, Lab. (Hitachi, Ltd.)
4th Author's Name Takao Murakami  
4th Author's Affiliation Hitachi, Ltd.,System Development, Lab. (Hitachi, Ltd.)
5th Author's Name Yoshinori Honda  
5th Author's Affiliation Hitachi, Ltd.,System Development, Lab. (Hitachi, Ltd.)
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Date Time 2010-11-17 15:15:00 
Presentation Time 25 
Registration for ISEC 
Paper # IEICE-ISEC2010-54,IEICE-LOIS2010-33 
Volume (vol) IEICE-110 
Number (no) no.281(ISEC), no.282(LOIS) 
Page pp.31-36 
#Pages IEICE-6 
Date of Issue IEICE-ISEC-2010-11-10,IEICE-LOIS-2010-11-10 

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