Ian Grigg wrote:
It's actually quite an amusing problem. When put
in those terms, it might be cheaper and more secure
to go find some druggie down back of central station,
and pay them a tenner to write out the ransom demand.
Or buy a newspaper and start cutting and pasting the
letters...
or
Simple way to test. Get two printers of the same make and model. Print
identical documents on both printers, scan them, diff the scans. Some
will be noise, repeat several times, see which noise repeats and you get
closer and closer to the serial #'s.
At 05:23 PM 10/18/2004, R.A. Hettinga wrote:
http://news.bbc.co.uk/2/low/technology/3753886.stm
It turns out that their techniques aren't all that useful.
Changing laser printer cartridges changes the results.
You might find that two documents were printed
by the same printer, but it doesn't give
| It turns out that their techniques aren't all that useful.
| Changing laser printer cartridges changes the results.
| You might find that two documents were printed
| by the same printer, but it doesn't give you the
| options for tracking it down that manual typewriters did.
Actually, they say
I seem to recall hearing a rumour that suggested that for years now, photocopiers have been leaving their serial number on the copies they produce. If true, and I am inclined to believe it, it follows naturally that something similar might happen with laser-printers and ink-jet printers.Ian Grigg
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 -
