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Universal Threshold Calculation for Fingerprinting Decoders using Mixture Models

Schäfer, Marcel and Mair, Sebastian and Berchtold, Waldemar and Steinebach, Martin (2015):
Universal Threshold Calculation for Fingerprinting Decoders using Mixture Models.
In: IH&MMSec '15 Proceedings of the 3rd ACM Workshop on Information Hiding and Multimedia Security, ACM, Portland, Oregon, ISBN 978-1-4503-3587-4,
DOI: 10.1145/2756601.2756611,
[Conference or Workshop Item]

Abstract

Collusion attacks on watermarked media copies are commonly countered by probabilistically generated fingerprinting codes and appropriate tracing algorithms. The latter calculates accusation scores representing the suspiciousness of the fingerprints. In a 'detect many' scenario a threshold decides which scores are associated to the colluders. This work proposes a universal method to calculate thresholds for different decoders solely with knowledge of the accusation scores from the actual attack. Applying mixture models on the scores, the threshold is set up satisfying the selected error probabilities. It is independent from the fingerprint generation and can be applied at any decoder. Also no knowledge about the number of attackers or their strategy is needed.

Item Type: Conference or Workshop Item
Erschienen: 2015
Creators: Schäfer, Marcel and Mair, Sebastian and Berchtold, Waldemar and Steinebach, Martin
Title: Universal Threshold Calculation for Fingerprinting Decoders using Mixture Models
Language: German
Abstract:

Collusion attacks on watermarked media copies are commonly countered by probabilistically generated fingerprinting codes and appropriate tracing algorithms. The latter calculates accusation scores representing the suspiciousness of the fingerprints. In a 'detect many' scenario a threshold decides which scores are associated to the colluders. This work proposes a universal method to calculate thresholds for different decoders solely with knowledge of the accusation scores from the actual attack. Applying mixture models on the scores, the threshold is set up satisfying the selected error probabilities. It is independent from the fingerprint generation and can be applied at any decoder. Also no knowledge about the number of attackers or their strategy is needed.

Title of Book: IH&MMSec '15 Proceedings of the 3rd ACM Workshop on Information Hiding and Multimedia Security
Number: 3
Publisher: ACM
ISBN: 978-1-4503-3587-4
Uncontrolled Keywords: collusion attacks, digital watermarking, fingerprinting codes, mixture models, traitor
Divisions: Profile Areas > Cybersecurity (CYSEC)
Profile Areas
Event Location: Portland, Oregon
Date Deposited: 14 Aug 2017 14:09
DOI: 10.1145/2756601.2756611
Identification Number: TUD-CS-2015-12084
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