Security and Robustness Constraints for Spread-Spectrum Tardos Fingerprinting

Benjamin Mathon; Patrick Bas; François Cayre; Benoît Macq

hal-00537812, version 1

Security and Robustness Constraints for Spread-Spectrum Tardos Fingerprinting

Benjamin Mathon () ^1, 2, Patrick Bas () ³, François Cayre () ¹, Benoît Macq () ²

WIFS'10 - IEEE Workshop on Information Forensics and Security (2010) 1-6

Abstract: This paper presents a practical analysis of the impact of robustness and security on Tardos' collusion-secure fingerprinting codes using spread-spectrum watermarking modulations. In this framework, we assume that the coalition has to face an embedding scheme of given security level and consequently has to suffer a probability of wrongly estimating their embedded symbols. We recall the Worst Case Attack associated to this probability, e.g. the optimal attack which minimises the mutual information between the sequence of a colluder and the pirated one. For a given achievable rate of the Tardos' fingerprinting model, we compare the Improved Spread-Spectrum embedding versus a new secure embedding (called rho-Circular Watermarking) considering the AWGN channel. We show that secure embeddings are more immune to decoding errors than non-secure ones while keeping the same fingerprinting capacity.

1: Grenoble Images Parole Signal Automatique (GIPSA-lab)
CNRS : UMR5216 – Université Joseph Fourier - Grenoble I – Université Pierre-Mendès-France - Grenoble II – Université Stendhal - Grenoble III – Institut Polytechnique de Grenoble - Grenoble Institute of Technology
2: Laboratoire de Télécommunications et Télédétection [Louvain] (TELE)
Université Catholique de Louvain (UCL) - Belgique
3: Laboratoire d'Automatique, Génie Informatique et Signal (LAGIS)
CNRS : UMR8146 – Université Lille I - Sciences et technologies – Ecole Centrale de Lille

hal-00537812, version 1
http://hal.archives-ouvertes.fr/hal-00537812
oai:hal.archives-ouvertes.fr:hal-00537812
From: Benjamin Mathon <>
Submitted on: Friday, 19 November 2010 14:03:26
Updated on: Tuesday, 21 February 2012 11:38:58

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