In the digital world, we now know, there’s basically nowhere to hide. Encryption is flawed–even Tor is vulnerable–and the tech companies we rely on every day are more than happy to gift wrap our personal data for the feds. But computers don’t just know how to snoop on packets and pixels. Optical character recognition, the same stuff that Google uses to scan the world’s books, can turn real, physical documents into more grist for the data mill with astonishing accuracy. Sang Mun, a designer who has previously worked with the NSA during his time in the Korean military, came up with a clever way to fight back: He made a typeface that’s unparsable to computers, but legible to human eyes.