Re: SDMI - The way I would make the water mark.

["Bluefish (P.Magnusson)" <11a () GMX NET>]

Again, this is an old method which I remember discussed at my computer
security class :-) ... An attack would include move "notes" randomly a
few MS, or copying some notes a few MS.

Basicly, as of today, there aren't any watermarking which really works.
OK, if the technice is known, applying all attacks will cause noticeable
damage, but if you only aim for certain watermarks it seems you can remove
it without causing much more damage than adding it allready did. Assuming
no one has a totally new technice, though I sincerly doubt it ;)

..:::::::::::::::::::::::::::::::::::::::::::::::::..
     http://www.11a.nu || http://bluefish.11a.nu
    eleventh alliance development & security team

             http://www.eff.org/cafe

On Fri, 13 Oct 2000, Richard Rager wrote:

>   Ok I have an idea how the SDMI lives thought the wav - mp3 - wav and DA
> -> AD -> DA.
>
>
>    Music is make up of notes.  If the note was moved 200MS either way with
> a known pattern the the music can be water mark and be converted to MP3
> back to WAV and still see it.  The human ear would not hear it.
>
>
> Enjoy,
>
> Richard Rager