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CASED is funded by

Landes-Ofensive Entwicklung Wissenschaftlich-ökonomischer Exzellenz

Talks

  • Boris Skoric

    Eindhoven University of Technology
    "Recent advances on Tardos codes"
    September 14, 2010, from 13:30 o'clock, TU Darmstadt | Piloty-Building S2/02, Room E202

    Fingerprinting provides a means for tracing the origin and distribution of digital data. Before distribution of digital content, the content is modified by applying an imperceptible fingerprint, which plays the role of a personalized serial number. The fingerprint is usually embedded through a watermarking algorithm. Once an unauthorized copy of the content is found, the identity can be determined of those users who participated in the creation of the unauthorized copy. This can be done using a tracing algorithm, which outputs a list of allegedly guilty users. This process is also known as `forensic watermarking'.

    Reliable tracing of content requires security against attacks that aim to remove the embedded information from a copy.  Collusion attacks, where a coalition of pirates collude to compare their copies, are a particular threat. As any differences between the copies have to arise from the watermarks and not the content, such a comparison gives information which can be used to remove the watermark.

    The by now famous Tardos code has asymptotically optimal (for large coalitions) resilience against collusion attacks. However, there are several unresolved issues regarding the performance of the code for small coalitions, and several seemingly arbitrary parameter choices in the q-ary generalization of the Tardos code.

    This talk presents recent work that resolves some of these issues.

CDC-Lecture Series

Thur 11:40-13:20 o`clock at TU Darmstadt, Piloty-Building S2/02 Room B002

  • [B002] Michael Brickenstein - Boolean Gröbner bases, the PolyBoRi-framework and further approaches (Guest Lecture)
    16. September 2010