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Nonfiction: Steganography: The same image viewed by white, blue, green and red lights reveals different hidden numbers.

1484: Polymath Johannes Trithemius publishes Chronicles of an Gnomon Algorithm Cryptographer, for which he will be posthumously awarded the Pulitzer Prize.

Cryptography (nonfiction)
Mathematics (nonfiction)
Oblivious transfer (nonfiction) - an oblivious transfer (OT) protocol is a protocol in which a sender transfers one of potentially many pieces of information to a receiver, but remains oblivious as to what piece (if any) has been transferred.
Steganography (nonfiction)

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 Nonfiction: [[Steganography (nonfiction)|Steganography]]: The same image viewed by white, blue, green and red lights reveals different hidden numbers.
+== In the News ==
+<gallery>
+File:Johannes Trithemius.jpg|link=Johannes Trithemius (nonfiction)|1484: Polymath [[Johannes Trithemius (nonfiction)|Johannes Trithemius]] publishes ''Chronicles of an Gnomon Algorithm Cryptographer'', for which he will be posthumously awarded the Pulitzer Prize.
+</gallery>
 == Fiction cross-reference ==