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.
