Former NSA contractor designs 'surveillance-proof' font

Former NSA contractor Sang Mun's ZXX font is designed to disrupt Optical Character Recognition (OCR) -- the software used by Google and others to scan books or physical documents.

Can this font help protect your privacy?

 Can graphic design help protect your privacy? Sang Mun, a designer and former NSA contractor, thinks so.

Just months after Edward Snowden controversially lifted the lid on digital surveillance being conducted by the U.S. and other governments, the issue of online privacy is back in the spotlight.

Earlier this month Facebook CEO Mark Zuckerberg expressed concern that users' trust in internet companies had been damaged by the revelations. Google's Eric Schmidt also called for greater transparency from the U.S. government over surveillance.

Sang Mun's response was more direct -- the Korean designer has created four new fonts called ZXX that aim to disrupt the Optical Character Recognition (OCR) systems used by Google and others to analyze text.