Pollux-Chiffre – frwiki.wiki oder Ars Cryptographica: Table des matières (apprendre-en-ligne.net)

The Pollux cipher is an encryption system based on Morse code that replaces dots, hyphens and spaces with digits 0-9. The replacement is controlled by a key.

The key consists of 10 characters and assigns the digits 0 … 9 with a dot ., dash – or x for a space.

The Morse code is then replaced character by character with the corresponding digit. The characters used are selected at random so that the encoded text is different for each encoding.

Because a Morse code character is encoded in different characters, the cipher is homophonic.

For better readability, the coded text is often divided into groups of 5.