Re: [WM]: security of watermarks

[Martin Steinebach <martin.steinebach@ipsi.fraunhofer.de>]

Dear Uschi Krause,

I agree that the security of watermarking algorithms is still a rather 
open research topic. For some idea about attacks like finding out if 
content is watermarked or trying to guess the embedded message, I 
suggest to have a look at steganalysis. As both steganography and 
watermarking share a lot of basic techniques and attack/security 
analysis is more developed in steganography, this area should be taken 
into account.

Regards
Martin

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 
>  
>-- 
------------------------------------------------------------
Dr. Martin Steinebach, Dipl.-Inform.
Transaction and Document Security (TAD) 
Fraunhofer SIT
Rheinstrasse 75, 64295 Darmstadt, Germany
Phone: +49 6151 869-349, Fax: +49 6151 869-224
E-mail: martin.steinebach@sit.fraunhofer.de
http://www.sit.fraunhofer.de
------------------------------------------------------------




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