Ars Technica: Scientists hid encryption key for Wizard of Oz text in plastic molecules

Ars Technica: Scientists hid encryption key for Wizard of Oz text in plastic molecules. “Scientists from the University of Texas at Austin sent a letter to colleagues in Massachusetts with a secret message: an encryption key to unlock a text file of L. Frank Baum’s classic novel The Wonderful Wizard of Oz. The twist: The encryption key was hidden in a special ink laced with polymers.”

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