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Identification of Traitors Using a Trellis

  • Marcel Fernandez
  • Miguel Soriano
Conference paper
  • 687 Downloads
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3269)

Abstract

In a fingerprinting scheme a different set of marks is embedded in each copy of a digital object, in order to deter illegal redistribution. A group of dishonest users, called traitors, collude to create a pirate copy that hides their identities, by putting together different parts of their copies. If the sets to be embedded are the codewords of an error correcting code then efficient algorithms can be used to trace the traitors. In this paper we present a tracing algorithm, that by applying the Viterbi algorithm to the trellis representation of a cyclic traceability code, finds all possibly identifiable traitors.

Keywords

Positive Parent Cyclic Code Viterbi Algorithm Soft Information List Decode 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Marcel Fernandez
    • 1
  • Miguel Soriano
    • 1
  1. 1.Department of Telematics EngineeringUniversitat Politècnica de CatalunyaBarcelonaSpain

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