Editing Enigma machine (section)

==== M3 (1934) ====
By 1930, the Reichswehr had suggested that the Navy adopt their machine, citing the benefits of increased security (with the plugboard) and easier interservice communications.{{sfn|Kahn|1991|p=43}} The Reichsmarine eventually agreed and in 1934<ref>{{harvnb|Kahn|1991|p=43}} says August 1934. {{harvnb|Kruh|Deavours|2002|p=15}} say October 2004.</ref> brought into service the Navy version of the Army Enigma, designated ''Funkschlüssel'' ' or ''M3''. While the Army used only three rotors at that time, the Navy specified a choice of three from a possible five.{{sfn|Kruh|Deavours|2002|p=98}}
[[File:Bundesarchiv Bild 101I-241-2173-09, Russland, Verschlüsselungsgerät Enigma.jpg|thumb|left|Enigma in use on the Russian front]]