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Paper Abstract and Keywords
Presentation 2020-03-17 11:15
Method of Cloning Attack against Image Recognizer and Its Countermeasure
Shouta Kinbara, Kazuaki Nakamura, Naoko Nitta, Noboru Babaguchi (Osaka Univ.) PRMU2019-94
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, cloud-based image recognition services are getting popular. A server of these services has a sophisticated image recognizer which is used to recognize images sent from client users and return the recognition results to the users. However, the server might suffer from a new type of attacks called cloning attack, in which an attacker sends a lot of images to the server and receives their recognition results to train a new recognizer that mimics the server’s original recognizer. The goal of this paper is to investigate a concrete method of cloning attack and its countermeasure. Naively, the server can prevent cloning attack by intentionally altering some percentage of its recognition results. This strategy is called intentional misrecognition, which could be failed if the attacker can estimate whether each image was intentionally misrecognized or not. We firstly propose a method to realize the estimation, using near-duplicate images. Then, we secondly propose a method of detecting the near-duplicate images as a countermeasure. Experimental results showed that both the methods are workable.
Keyword (in Japanese) (See Japanese page) 
(in English) image recognition / cloning attack / cloned recognizer / intentional misrecognition / near-duplicate image / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 481, PRMU2019-94, pp. 151-156, March 2020.
Paper # PRMU2019-94 
Date of Issue 2020-03-09 (PRMU) 
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 PRMU IPSJ-CVIM  
Conference Date 2020-03-16 - 2020-03-17 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To PRMU 
Conference Code 2020-03-PRMU-CVIM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Method of Cloning Attack against Image Recognizer and Its Countermeasure 
Sub Title (in English)  
Keyword(1) image recognition  
Keyword(2) cloning attack  
Keyword(3) cloned recognizer  
Keyword(4) intentional misrecognition  
Keyword(5) near-duplicate image  
1st Author's Name Shouta Kinbara  
1st Author's Affiliation Osaka University (Osaka Univ.)
2nd Author's Name Kazuaki Nakamura  
2nd Author's Affiliation Osaka University (Osaka Univ.)
3rd Author's Name Naoko Nitta  
3rd Author's Affiliation Osaka University (Osaka Univ.)
4th Author's Name Noboru Babaguchi  
4th Author's Affiliation Osaka University (Osaka Univ.)
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Date Time 2020-03-17 11:15:00 
Presentation Time 15 
Registration for PRMU 
Paper # IEICE-PRMU2019-94 
Volume (vol) IEICE-119 
Number (no) no.481 
Page pp.151-156 
#Pages IEICE-6 
Date of Issue IEICE-PRMU-2020-03-09 

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