Polybius square
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In cryptography, the Polybius square, also known as the Polybius checkerboard, is a device invented by the Ancient Greek historian and scholar Polybius, for fractionating plaintext characters so that they can be represented by a smaller set of symbols.
Description
The original square used the Greek alphabet, but can be used with any alphabet.
See also
- Cryptography
- Fryctoria
- Plaintext
- Polybius
- Punnett square
- Straddling checkerboard
- Symbol
- Tap code
- Topics in cryptography
External links
- Polybius square @ Wikipedia
