- Title:
- Security Issue and Collusion Attacks In Video Watermarking
- Presenter:
- Dr. Gwenael Doerr,
- Date:
- September 30, 2005
- Abstract:
- Ten years after its infancy, digital watermarking is still considered as a young technology. Despite the fact that it has been introduced for security-related applications such as copyright protection, almost no study has been conducted to assert the survival of embedded watermarks in a hostile environment. In this presentation, it will be shown that this lack of evaluation has led to critical security pitfalls against statistical analysis, also referred to as collusion attacks. Such attacks typically consider several watermarked documents and combine them to produce unwatermarked content. This threat is all the more relevant when digital video is considered since each individual video frame can be regarded as a single watermarked document by itself. Next, several countermeasures are introduced to combat the highlighted weaknesses. In particular, motion compensated watermarking and signal coherent watermarking will be investigated to produce watermarks which exhibit the same spatio-temporal self-similarities as the host video signal.
About the Speaker
Dr. Gwenael Doerr received in 2001 the telecommunications engineering degree from Institut National des Telecommunications (Telecom INT), Evry, France and the M.Sc. degree in computer science from Universite de Nice Sophia-Antipolis (UNSA), Sophia-Antipolis, France. He was an intern at NEC Research Institute, Princeton, NJ from April to September 2001, winning the Best French Internship Award for his work on trellis dirty paper watermarks. He then moved back to the Eurecom Institute, Sophia-Antipolis, France to do a Ph.D. on video watermarking which he obtained on June 2005. He is now a Lecturer at University College London (UCL) Adastral Park,UK. His research is focused on multimedia security and in particular digital watermarking and biometrics.
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