
Spartan scytale
A scytale (Greek: skytálē) is a cryptography system used by the Spartan Ephors to send secret messages.
The system consisted of two rods of the same thickness that were given to the participants of the communication. To send a message, a ribbon was wound in a spiral shape to one of the sticks and the message was written longitudinally, so that one letter at a time appeared on each turn of the ribbon. Once the message was written, the tape was unwound and sent to the receiver, who only had to roll it to the twin rod to read the original message.
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