undefined | Better HN

0 pointssneak4y ago0 comments

Color printers already do this, embedding the device serial into microdot patterns on print-outs.

Scanner firmware won't scan currency, even if doing so is legal.

0 comments

1 comments · 1 top-level

causi4y ago

I've never had an issue scanning currency. Some machines won't photocopy it.

j / k navigate · click thread line to collapse