Re: [WM]: security of watermarks

[nrc3@ee.duke.edu]

Hi watermarkers,
I was wondering if a user bought one copy of video and then captured the = video  from the computer monitor/TV screen using a
video camera and  resold many copies illegally.. How would watermarking or fingerprinting s= ecure  the video/image content ?

I would really appreciate anyone who can clarify on this fundamental quer= y ...


-Nilima
Quoting Teddy Furon <teddy.furon@irisa.fr>:

> See watermarking security articles here:
> http://www.irisa.fr/temics/publis/show.php?search_author=Furon
> 
> and also University of Vigo crew's works. for instance, there
>http://www.gts.tsc.uvigo.es/gpsc/cgi-bin/bibsearch.cgi? 
> keyword=&author=comesa%F1a
> 
> Teddy
> 
> 
> On 23 janv. 07, at 15:03, Krause, Uschi wrote:
> 
> > hello watermarkers,
> >
> > i'm currently writing my thesis on the topic "analysis of a 
> > watermarking and content security solution for a digital video 
> > archive".
> >
> > i've been evaluating different watermarking products and all the 
> > manufactures promise that watermarking is THE solution to protect 
> > digital media.
> >
> > i'm actually not so sure about that;-)
> >
> > true, a watermark cannot be removed unless you modify the data in
> > such 
> > way, that the quality suffers and the data is of no use anymore.
> >
> > but what about the security aspect? as far as i understood, a 
> > watermark can be regarded as a pseudo-random-noise, generated by
> > a  key. But any key (and any noise) can be cracked, right? How
> > difficult 
> > would be it be or how time consuming to find out the key and the
> > noise 
> > pattern?
> >
> > What do you reckon?
> > Any help is appreciated.
> >
> > cheers,
> > Uschi Krause


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