Isn't this the same technique Osama bin Laden people
are using to encode terrorist instructions within
internet porn images?

(Heard at FBI, "Honest Director, I was
 looking for terrorists,... really."

Tracy Johnson

-----Original Message-----
From: COLE,GLENN (Non-HP-SantaClara,ex2) [mailto:[log in to unmask]]
Sent: Thursday, February 22, 2001 6:49 PM

>That watermark (which is normally done by writing some sort of signature
into
>the low order bits of an image, across many pixels, so that it can't really

>be seen in the image) lasts exactly as long as the image is not manipulated

>in any manner (made larger, smaller, cropped or converted into another
>graphic format). At that point, the watermark is gone.

Makes sense.  How about a *visible* watermark then?  (Of course,
I don't know if this is acceptable in Dave's case.)

   http://www.imagingweb.com/aff/visual_watermark.htm
or
http://www.graphicssoft.about.com/compute/graphicssoft/c/ht/00/07/How_Add_Te
xt_Watermark0963973007.htm

(with apologies for the wrap).

--Glenn