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Paper Abstract and Keywords
Presentation 2018-09-28 13:15
Dynamic Estimation of Collusion Strategy for the Detection of Colluders in Fingerprinting Codes
Tatsuya Yasui, Minoru Kuribayashi, Nobuo Funabiki (Okayama Univ.), Isao Echizen (NII) LOIS2018-19 IE2018-39 EMM2018-58
Abstract (in Japanese) (See Japanese page) 
(in English) An optimal detector known as MAP detector has been proposed for the probabilistic fingerprinting
code. It needs two kinds of important information. One is the collusion strategy used at the generation of a pirated codeword from colluders’ codewords, and the other is the number of colluders. In our previous study, these two parameters can be estimated with high probability for Nuida code. However, its computational cost is linearly increased with the number of estimated candidates. In this study, in order to reduce the computational cost, we proposed a dynamic estimator which adjusts dynamically the number of estimated candidates. Since the characteristics calculated from a pirated codeword are different for collusion strategies, we measure characteristic vectors in multi-dimensional space derived both from each collusion strategy and the number of colluders, and find candidates which vectors are within a certain distance from the vector calculated from a pirated codeword. As a result of computer simulations, it is confirmed that the proposed method can cut the computational cost about half with little sacrifice in the detection accuracy.
Keyword (in Japanese) (See Japanese page) 
(in English) fingerprinting code / optimal detector / collusion strategy / number of colluders / estimator / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 224, EMM2018-58, pp. 65-70, Sept. 2018.
Paper # EMM2018-58 
Date of Issue 2018-09-20 (LOIS, IE, 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 LOIS2018-19 IE2018-39 EMM2018-58

Conference Information
Committee IEE-CMN EMM LOIS IE ITE-ME  
Conference Date 2018-09-27 - 2018-09-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Beppu Int'l Convention Ctr. aka B-CON Plaza 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Multimedia Communication/System, Lifelog Applications, IP Broadcasting/Video Transmission, Media Security, Media Processing (AI, Deep Learning), etc. 
Paper Information
Registration To EMM 
Conference Code 2018-09-CMN-EMM-LOIS-IE-ME 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Dynamic Estimation of Collusion Strategy for the Detection of Colluders in Fingerprinting Codes 
Sub Title (in English)  
Keyword(1) fingerprinting code  
Keyword(2) optimal detector  
Keyword(3) collusion strategy  
Keyword(4) number of colluders  
Keyword(5) estimator  
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Keyword(8)  
1st Author's Name Tatsuya Yasui  
1st Author's Affiliation Okayama University (Okayama Univ.)
2nd Author's Name Minoru Kuribayashi  
2nd Author's Affiliation Okayama University (Okayama Univ.)
3rd Author's Name Nobuo Funabiki  
3rd Author's Affiliation Okayama University (Okayama Univ.)
4th Author's Name Isao Echizen  
4th Author's Affiliation National Institute of Informatics (NII)
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Speaker Author-1 
Date Time 2018-09-28 13:15:00 
Presentation Time 25 minutes 
Registration for EMM 
Paper # LOIS2018-19, IE2018-39, EMM2018-58 
Volume (vol) vol.118 
Number (no) no.222(LOIS), no.223(IE), no.224(EMM) 
Page pp.65-70 
#Pages 6 
Date of Issue 2018-09-20 (LOIS, IE, EMM) 

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