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This paper deals with active fingerprinting a.k.a. traitor tracing where a collusion of dishonest users merges their individual versions of a content to yield a pirated copy. The Tardos codes are one of the most powerful tools to fight against such collusion process by identifying the colluders. Instead of studying as usual the necessary and sufficient code length in a theoretical setup, we adopt...
This paper proposes a new fingerprinting decoder based on the Markov Chain Monte Carlo (MCMC) method. A Gibbs sampler generates groups of users according to the posterior probability that these users could have forged the sequence extracted from the pirated content. The marginal probability that a given user pertains to the collusion is then estimated by a Monte Carlo method. The users having the...
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