Dynamic traitor tracing

Research output: Contribution to journalArticlepeer-review


Traitor tracing schemes were introduced to combat the typical piracy scenario whereby pirate decoders (or access control smartcards) are manufactured and sold by pirates to illegal subscribers. Those traitor tracing schemes, however, are ineffective for the currently less common scenario where a pirate publishes the periodical access control keys on the Internet or, alternatively, simply rebroadcasts the content via an independent pirate network. This new piracy scenario may become especially attractive (to pirates) in the context of broadband multicast over the Internet. In this paper we consider the consequences of this type of piracy and offer countermeasures. We introduce the concept of dynamic traitor tracing which is a practical and efficient tool to combat this type of piracy.

Original languageEnglish
Pages (from-to)211-223
Number of pages13
JournalJournal of Cryptology
Issue number3
StatePublished - 2001


  • Broadcast
  • Encryption
  • Imprinting
  • On-line algorithms
  • Pay tv
  • Traitor tracing
  • Watermarking


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