#A Spanish cipher from the mid 20th century – Klausis Krypto Kolumne
„A Spanish cipher from the mid 20th century – Klausis Krypto Kolumne“ Between 1945 and 1954, the staff of Spanish prisons used an encryption method based on a cipher slide and a table. Can my readers help to understand how this system worked? Once again, I have found some interesting information about a historical encryption…