When you purchase an iTunes gift card and redeem it in the App Store, the camera on your iPhone, iPad, or Mac can scan the code on the card to recognize it automatically, saving you the time of typing ...
Three researchers from Columbia University have created a technique named FontCode that can be used to embed hidden messages inside font glyphs (characters). The technique takes advantage of how ...
While it's already possible to relay information via barcodes or QR codes, those codes are entirely visible when included in a document. Using Columbia University's FontCode system, however, users can ...
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