Tool to decrypt/encrypt using a scytale. Scytale is a very simple transposition cipher used in ancient Greece and by spartans. A band is wrapped around a rod, a message is written, and when the band is unrolled a ciphertext appears.

Scytale Cipher - dCode

Tag(s) : Transposition Cipher

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Tool to decrypt/encrypt using a scytale. Scytale is a very simple transposition cipher used in ancient Greece and by spartans. A band is wrapped around a rod, a message is written, and when the band is unrolled a ciphertext appears.

Scytale Encryption uses a cylinder and a band characterized by its number of turns L of the band around the cylinder.

Example: Code DCODE with a band L=3.

The message is written along the cylinder, one letter per band, and when the end is reached, go to a new line.

If needed, complete the last line with another character, e.g. X or _.

Example:

DCO |

DE_ |

The ciphered message is the band unrolled, (i.e the message read by column).

Example: The cipher text is DDCEO_

Scytale Decryption requires to know the number N of letters by turn of the band (the size of the cylinder), or L the number of turns around the cylinder.

Example: The ciphertext is DDCEO_ (6-character long) and the band is L=3, then N=2 (because 6/3=2).

Write the message on the band and wraps the band around the cylinder (of correct size) and the plain text should appear.

Example:

DCO |

DE_ |

The coincidence index is equal to the one of the original text (as it is a transposition cipher).

One can crack Scytale by testing all possible size of the rectangle.

Scytale is a practical application of the Caesar Cipher.

8 to 6 centuries BC

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scytale,box,caesar,line,column,greece,sparta,spire,scroll,parchment,rod

Source : https://www.dcode.fr/scytale-cipher

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