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Fontcode

Researchers hide information in plain text. Computer scientists have invented FontCode, a way to embed hidden information in ordinary text by imperceptibly changing the shapes of fonts in text. The hidden information persists even when documents or images with perturbed texts are printed or converted to another file type. Method could prevent document tampering, protect copyrights, as well as embed QR codes and other metadata without altering the look or layout of a document. Source 3h.

Fontcode

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