Re: hacksdmi?

[Richard Rager <kb8rln () PENGUINMASTER COM>]

On Mon, 16 Oct 2000, Brooke, O'neil (EXP) wrote:

> > -----Original Message-----
> > From:       Steve Mosher [SMTP:farq () KILN ISN NET]
> > Sent:       Thursday, October 12, 2000 8:39 AM
> > To: VULN-DEV () SECURITYFOCUS COM
> > Subject:    Re: hacksdmi?
>       <snip>
> >     I'm thinking that secure DA->AD->DA watermarking is an unholy
> > graal of sorts, i.e. not something I'd ever expect to really work. The
> > watermark, in this case, has to exist in the sound, somewhere. If you know
> > the process, what's to stop you from mucking with that portion of the
> > sound?
>       This maybe a silly question but, couldn't they put a watermark into
> the sound by using sounds that we cannot hear? Very high or very low
> frequencies could be used, so could sounds that will be overpowered by the
> watermarked content. (note: this would entail the creation of new sounds,
> not simply the tweaking of existing sounds within the content) If frequency
> hoping is used in the algorithm it may be difficult to know where these
> watermark sounds are located.


  The simple answer to that is that a moving avg say of 10 byte.  The
moving avg is the output.

Enjoy,

 Richard Rager