A common case of the Caesar cipher, using a key of 13.

Creates an encode mapping for Substitution that performs a Caesar cipher. This replaces each of the 26 characters of the basic latin alphabet with another of those characters, key places away from the original.

Both uppercase and lowercase letters are affected.

A classic simple substitution cipher.

Any character found to be a key in the Substitution.encodeMapping/Substitution.decodeMapping is replaced with its corresponding item. Other characters are passed through without modification.

A common case of the Caesar cipher, using a key of 13.