Printers betray document secrets

[Steve Furlong]

On Tue, 2004-10-19 at 16:14, Ian Grigg wrote:
> R.A. Hettinga wrote:
> > <http://news.bbc.co.uk/2/low/technology/3753886.stm>
> 
> >  US scientists have discovered that every desktop printer has a signature
> > style that it invisibly leaves on all the documents it produces.
> 
> I don't think this is new - I'm pretty sure it was
> published about 6 or 7 years back as a technique.

I think you're thinking of color copiers.