[–] 5541135? 0 points 4 points 4 points (+4|-0) ago
Good question. I have heard this before, but I don't know if it is true.
However, I do know that most of the time a printed page can be matched up to the printer it came from because every printer makes minor copying errors that can be matched like a fingerprint.
But you would have to know what printer to look at to make the match.
[–] 5541475? 0 points 2 points 2 points (+2|-0) ago (edited ago)
Not all, but many are:
EEVblog #825 - Your Printer Is Spying On You!
[–] 5541608? 0 points 9 points 9 points (+9|-0) ago
Not a serial number, but an encoded series of colored dots. It usually DOES contain a serial number but can also contain the time, date and size of the print job, which computer it came from (MAC address) and even the title. Thankfully its not every brand, or even all models sold by the brands. But it does appear to be the most common printers used by offices.
[–] 5541083? [S] 0 points 2 points 2 points (+2|-0) ago
Does this system have some sort of name, perhaps? So I can google doogle it?
[–] 5541121? 0 points 1 point 1 point (+1|-0) ago
Microprinting. And to my knowlege, yes all modern printers do this.
[–] 5541131? 0 points 5 points 5 points (+5|-0) ago
https://en.wikipedia.org/wiki/Printer_steganography
[–] 5541156? 0 points 3 points 3 points (+3|-0) ago
http://www.instructables.com/id/Yellow-Dots-of-Mystery-Is-Your-Printer-Spying-on-/
I guess it's not always micro