Four-rotor German Enigma cypher machine, 1939-1945.
4 0 c m
 
33cm
actual image size: 25cm x 32cm

Four-rotor German Enigma cypher machine, 1939-1945.

© Science Museum / Science & Society Picture Library

Description

A four-rotor German Enigma cypher machine with a second operator display (a 'remote lampboard'), made during World War II. This type of machine, devised by the German Navy in 1939, was used to encode wartime mesages requiring a particularly high degree of security. The cracking of German cypher codes by Allied intelligence was a major achievement in cryptanalysis and played a key role in the outcome of the North Atlantic U-boat engagements. The search to crack the the Enigma codes also resulted in 'Colosus', the first all-electronic digital computer. This rare machine is thought to have been used in the post-war years for coding diplomatic traffic in Switzerland.
 

Image Ref.

10318734
 

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