ZXX
A font designed to be unable to be read via OCR (Optical Character Recognition):
The name ZXX comes from the Library of Congress’ Alpha-3 ISO 639-2 — codes for the representation of names of languages. ZXX is used to declare No linguistic content; Not applicable.
Free Open Type Font to open up governments.You can find out more (and download the font yourself) at the project’s page here
(via thiagovscoelho)