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:
“Rationalists, wearing square hats,
Think, in square rooms,
Looking at the floor,
Looking at the ceiling.
They confine themselves
To right-angled triangles.”
—Wallace Stevens (1879–1955)