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Abstract

In an effort to prevent or discourage the unauthorized redistribution of legally purchased copyrighted material, several techniques have been proposed for identifying and tracing content. Such approaches are typically flawed in two ways. This paper briefly describes specific techniques proposed in the literature or available as products, describes the two principal flaws, and mentions some alternatives intended to circumvent these flaws.

Keywords

Digital Library Hybrid Original Copyright Protection Marked Image Random String 
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 Science+Business Media New York 1999

Authors and Affiliations

  • Cynthia Dwork
    • 1
  1. 1.IBM Almaden Research CenterUSA

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