In message <[EMAIL PROTECTED]>, Marc Horowitz writes:
>
> >> In short, is steganography the ultimate surveillance tool?
>
> Like most surveillance technologies, this is a game of constant
> incremental improvements. You watch me through a window, I put up
> curtains. You listen through a hidden microphone, I increase the
> background noise. Etc.
>
> As was discussed here a few weeks ago, it's very difficult to do
> undefeatable watermarking, and I'd say it's impossible to do
> undetectable watermaking in a digital medium (just compare the
> documents). My point is that stego could be used as a surveillance
> tool, but it would be difficult, and defeating it would be feasible.
> Therefore, I don't believe it is the "ultimate" surveillance tool.
So -- has anyone on this list found the watermarking present in color copier
output?
--Steve Bellovin
