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Proceedings Paper

Combining digital watermarks and collusion-secure fingerprints for digital images
Author(s): Jana Dittmann; Alexander Behr; Mark Stabenau; Peter Schmitt; Joerg Schwenk; Johannes Ueberberg
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Paper Abstract

Digital watermarking is the enabling technology to prove ownership on copyrighted material, detect originators of illegally made copies, monitor the usage of the copyrighted multimedia data and analyze the spread spectrum of the data over networks and servers. Embedding of unique customer identification as a watermark into data is called fingerprinting to identify illegal copies of documents. Basically, watermarks embedded into multimedia data for enforcing copyrights must uniquely identify the data and must be difficult to remove, even after various media transformation processes. Digital fingerprinting raises the additional problem that we produce different copies for each customer. Attackers can compare several fingerprinted copies to find and destroy the embedded identification string by altering the data in those places where a difference was detected. In our paper we present a technology for combining a collusion-secure fingerprinting scheme based on finite geometries and a watermarking mechanism with special marking points for digital images. The only marking positions the pirates can not detect are those positions which contain the same letter in all the compared documents, called intersection of different fingerprints. The proposed technology for a maximal number d of pirates, puts enough information in the intersection of up to d fingerprints to uniquely identify all the pirates.

Paper Details

Date Published: 9 April 1999
PDF: 12 pages
Proc. SPIE 3657, Security and Watermarking of Multimedia Contents, (9 April 1999); doi: 10.1117/12.344702
Show Author Affiliations
Jana Dittmann, German National Research Ctr. for Information Technology (Germany)
Alexander Behr, German National Research Ctr. for Information Technology (Germany)
Mark Stabenau, German National Research Ctr. for Information Technology (Germany)
Peter Schmitt, Justus Liebig Univ. (Germany)
Joerg Schwenk, Deutsche Telekom (Germany)
Johannes Ueberberg, debis, IT Security Services (Germany)

Published in SPIE Proceedings Vol. 3657:
Security and Watermarking of Multimedia Contents
Ping Wah Wong; Edward J. Delp III, Editor(s)

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