Combining Tardos fingerprinting codes and fingercasting

S. Katzenbeisser, B. Skoric, M.U. Celik, A.R. Sadeghi

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    12 Citations (Scopus)


    Forensic tracking faces new challenges when employed in mass-scale electronic content distribution. In order to avoid a high load at the server, the watermark embedding process should be shifted from the secure server to the client side, where (1) the security of the watermark secrets must be ensured, and (2) collusion-resistance against a reasonably sized coalition of malicious users needs to be guaranteed. The combination of secure content broadcasting, secure embedding and collusion tolerance aspects has been recently addressed and termed as Fingercasting. However, the proposed solution does not apply a special collusion-resistant code, but derives a limited resistance against collusion attacks from the underlying spread spectrum watermark. In this paper, we make the first step towards tackling this problem: we propose a construction that provides collusion-resistance against a large coalition in a secure watermark embedding setting. In particular, we propose to incorporate a variant of the collusion resistant random code of Tardos, currently the code with best asymptotic behavior, into a Fingercasting framework. Through statistical analysis we show that the combination is feasible for a small subset of possible Fingercasting system parameters.
    Original languageEnglish
    Title of host publicationInformation Hiding
    Subtitle of host publication9th International Workshop, IH 2007, Saint Malo, France, June 11-13, 2007, Revised Selected Papers
    EditorsT. Furon, F. Cayre, G.J. Doërr, P. Bas
    Place of PublicationBerlin
    Number of pages17
    ISBN (Electronic)978-3-540-77370-2
    ISBN (Print)978-3-540-77369-6
    Publication statusPublished - 2008

    Publication series

    NameLecture Notes in Computer Science (LNCS)
    ISSN (Print)0302-9743


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