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?