• 4 rotors - one more than standard
  • M18171
  • Geheim
  • Plugboard (Steckerbrett)

Naval ENIGMA machine

Newer Older

Die Kriegsmarine (Navy)

With a naval force small in numbers, but technically advanced, the German Naval High Command, in order to offset Allied Naval superiority, adopted a strategy designed to conceal as much as possible the location, intention and movement of its forces.

Forced by its nature to rely on radio communications, the German Navy issued to each vessel from battleship to harbor defense craft an ENIGMA cipher machine to ensure security. Here, as with other services, the dependence on ENIGMA for communications security proved to be disastrous.

Source National Cryptologic Museum

ENIGMA remains the best known German cryptographic machine of World War II.

From Wikipedia - A four-rotor Enigma was introduced by the Navy for U-boat traffic on 1 February 1942, called M4 (the network was known as "Triton", or "Shark" to the Allies). The extra rotor was fitted in the same space by splitting the reflector into a combination of a thin reflector and a thin fourth rotor.

ENIGMA cipher machine collection

i09_0214 094

Parker Bright, stevelewalready, and 2 other people added this photo to their favorites.

  1. driesvandenelzen 50 months ago | reply

    Hi, I'm an admin for a group called Enigma machines WWII, and we'd love to have this added to the group!

  2. brewbooks 32 months ago | reply

    I don't think I'll be at the Enigma auction but there is enough info in the Enigma section of the Crypto Museum of the Crypto Museum to build a replica.

keyboard shortcuts: previous photo next photo L view in light box F favorite < scroll film strip left > scroll film strip right ? show all shortcuts