Paper Abstract and Keywords |
Presentation |
2018-03-05 14:35
[Poster Presentation]
Estimation of Collusion Strategy for Fingerprinting Codes Tatsuya Yasui, Minoru Kuribayashi, Nobuo Funabiki (Okayama Univ.) EMM2017-80 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
An optimal detector is known as MAP detector has been proposed for the probabilistic fingerprinting codes such as Tardos and Nuida codes.
It calculates the correlation score between each user's codeword and a pirated codeword, and judges the user as guilty whose score exceeds a threshold.
However, it needs two kinds of important information. One is the collusion strategy which is used at the generation of a pirated codeword from colluders' codewords, and the other is the number of colluders.
In this study, in order to calculate an optimal score, we propose an estimator which outputs these two parameters from a pirated codeword.
At the estimation of collusion strategy, we measure the bias in the pirated codeword by observing the number of symbols "0" and "1", and compare with some bias patterns possible collusion strategies.
For the estimation of number of colluders, we serch the closest strategy from all patterns with combination of collusion strategy and number of colluders.
As a result of computer simulations, collusion strategy can be estimated with high probability. In addition, it is revealed that the traceability of the detector using the proposed estimator is extremely close to the optimal detector. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
fingerprinting code / optimal detector / collusion strategy / number of colluders / estimator / / / |
Reference Info. |
IEICE Tech. Rep., vol. 117, no. 476, EMM2017-80, pp. 17-22, March 2018. |
Paper # |
EMM2017-80 |
Date of Issue |
2018-02-26 (EMM) |
ISSN |
Print edition: ISSN 0913-5685 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) |
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EMM2017-80 |
Conference Information |
Committee |
EMM |
Conference Date |
2018-03-05 - 2018-03-06 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Naze Community Center (Amami-Shi, Kagoshima) |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Image and Sound Quality, Metrics for Perception and Recognition, Human Auditory and Visual System, etc. |
Paper Information |
Registration To |
EMM |
Conference Code |
2018-03-EMM |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Estimation of Collusion Strategy for Fingerprinting Codes |
Sub Title (in English) |
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fingerprinting code |
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optimal detector |
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collusion strategy |
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number of colluders |
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estimator |
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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 |
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Okayama University (Okayama Univ.) |
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Speaker |
Author-1 |
Date Time |
2018-03-05 14:35:00 |
Presentation Time |
60 minutes |
Registration for |
EMM |
Paper # |
EMM2017-80 |
Volume (vol) |
vol.117 |
Number (no) |
no.476 |
Page |
pp.17-22 |
#Pages |
6 |
Date of Issue |
2018-02-26 (EMM) |
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