Permutation Cipher

Tags

cryptography

A sort of cipher which [see page 14, shuffles] the plaintext in some way (reorders the position of characters in the plain-text).

For example the Scytale cipher writes a message on a belt and then wraps it around a baton, reading it left-to-right to get the cipher-text. The key so-to-speak in this case is the diameter of the rod.

Another [see page 15, example] reads characters in blocks of 5 and shuffles them using the key \( \{2,1,5,3,4\} \).