by Michael Smith
1952 May 1
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Machine ciphers · Cryptography
Enigma
1984
Electronic intelligence · Machine ciphers
The emperor's codes
2000
Cryptography · Machine ciphers
Machine cryptography and modern cryptanalysis
1985
Pictorial works · World War, 1939-1945
The U-boat war, 1939-1945
2008
Cryptography · Electronic intelligence
Ultra and the Army Airforces in World War II
1987
Electronic intelligence · Secret service
The German Enigma cipher machine
2005
Secret service · World War, 1939-1945
The Ultra secret
1974
ULTRA (Intelligence system) · World War, 1939-1945
Code wars
2011
Enigma cipher system · ULTRA (Intelligence system)
ULTRA 1ntelligence e macchine ENIGMA nella guerra di Spagna 1936-1939
2010
Cryptography · Submarine
The secret capture
