By the 1970s newer computer-based ciphers were becoming popular as the world increasingly turned to computerised communications, and the usefulness of Enigma copies (and rotor machines generally) rapidly decreased.
I 1970 var nyere computerbaserede kodesystemer ved at blive almindelige, efterhånden som verden i større grad gik over til computeriseret kommunikation, og brugbarheden af Enigma (og skivemaskiner i almindelighed) hastigt aftog.