In cryptography, the Polybius square, also known as the Polybius checkerboard, is a device invented by the Ancient Greek historian and scholar Polybius, described in Hist. X.45.6 ff., for fractionating plaintext characters so that they can be represented by a smaller set of symbols.
Read more about Polybius Square: Basic Form, Telegraphy and Steganography, Cryptography
Famous quotes containing the word square:
“I would say it was the coffin of a midget
Or a square baby
Were there not such a din in it.”
—Sylvia Plath (1932–1963)