Printer fingerprint decoder


Nice find! The EFF program is released under the GPL here: https://w2.eff.org/Privacy/printers/docucolor/docucolor.cgi

@Ego @Patrick do you think there is value in packaging this or should I just refer to it on our wiki page on the topic?

One piece of opsec I heard was that using a black and white only printer would have made this technique impossible. Do you know if this is true?

In Defense of The Intercept on the Reality Winner Case

What’s the value of packaging this? What could a user possibly do with that?

Printer tracking is an important topic. We have some documentation here:


Please check if it’s complete.

Perhaps it deserves its own wiki page and/or should be moved elsewhere. //cc @torjunkie


Good day,

As far as I can tell, @HulaHoop already made additions to that section 3 hours ago.

Have a nice day,



You’re right. This script only seems to say the dots are there which we know already and so it really doesn’t change anything unlike MAT that removes identifying info.