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

<watermarking@watermarkingworld.org>,
	LEIBY666 <LEIBY666@163.COM>
Subject: Re: [WM]: security of watermarks
<200701270602341398503@gmail.com>
In-Reply-To: <200701270602341398503@gmail.com>
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Depending on the desired media type, you should ask Fabien Petitcolas=20
for image and Andreas Lang for audio... I did only the first Stirmark=20
Audio design and passed this on to Andreas years ago.

But most Stirmark attacks should be rather seen as attacks on robustness =

than on security. Robustness evaluation is also an interesting field,=20
but here the important point is to develop a good idea about the use=20
scenario and the motivation of potential attackers. Many robustness=20
tests are rather brute force and may not fit real world applications.=20
Still, from a scientific point of view, it is interesting to learn how=20
strong a watermark is...

Regards
Martin



leiby666 wrote:
> Where can I get the software stirmark?
> =
------------------------------------------------------------------------
> leiby666
> 2007-01-27
> =
------------------------------------------------------------------------
> =
*=C3=A5=C2=8F=E2=80=98=C3=A4=C2=BB=C2=B6=C3=A4=C2=BA=C2=BA=C3=AF=C2=BC=C5=
=A1* Martin Steinebach
> =
*=C3=A5=C2=8F=E2=80=98=C3=A9=E2=82=AC=C2=81=C3=A6=E2=80=94=C2=B6=C3=A9=E2=
=80=94=C2=B4=C3=AF=C2=BC=C5=A1* 2007-01-27 01:05:03
> =
*=C3=A6=E2=80=9D=C2=B6=C3=A4=C2=BB=C2=B6=C3=A4=C2=BA=C2=BA=C3=AF=C2=BC=C5=
=A1* watermarking@watermarkingworld.org
> *=C3=A6=C5=A0=E2=80=9E=C3=A9=E2=82=AC=C2=81=C3=AF=C2=BC=C5=A1*
> *=C3=A4=C2=B8=C2=BB=C3=A9=C2=A2=CB=9C=C3=AF=C2=BC=C5=A1* Re: [WM]: =
security of watermarks
> 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=20
> watermarking and content security solution for a digital video
> archive".
> >
> > i've been evaluating different watermarking products and all the=20
> 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=20
> 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=20
> watermark can be regarded as a pseudo-random-noise, generated by a
> > key. But any key (and any noise) can be cracked, right? How=20
> 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

--=20
------------------------------------------------------------
Dr. Martin Steinebach, Dipl.-Inform.
Transaction and Document Security (TAD)=20
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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