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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.
"While there are obvious applications for espionage, we think FontCode has even more practical uses for companies wanting to prevent document tampering or protect copyrights, and for retailers and artists wanting to embed QR codes and other metadata without altering the look or layout of a document," says Changxi Zheng, associate professor of computer science and the paper's senior author. more
