- Nomen: French naval cipher. 
- ENIGMA: The big one.
- Enigma H: Eight-rotor model used by the Reichswehr.
- Enigma T (Tirpitz): Japanese modification of the Enigma K.
- Typex: British Enigma clone. GdNA attempted to break this machine but gave up after 1943. 
- AR 25: Diplomatic code. 
- IMPERO: Diplomatic code. 
- Navy Cipher D: Licensed version of the Enigma; broken by Britain. 
- CORAL: Cipher machine used infrequently by IJN naval attaches. 
- JADE: Cipher machine used by the IJN from 1942 to 1944.
- ORANGE: Cipher machine used by IJN naval attaches during the 1930s. Broken by Agnes Driscoll. Also referred to as the M-1.
- PURPLE Cipher machine used by the Foreign Office from 1939 to 1945. Also referred to as the Type B and System 97.
- RED: Cipher machine used by the Foreign Office from 1930 to 1938. Replaced by the Type B (PURPLE). Also referred to as the Type A and System 91.
- Enigma K: Variant used for military and diplomatic communications. Codes broken by France, Poland, UK, and US. Also referred to as INDIGO (US code name), Model K, Swiss K. 
- Interbank Code (Bank of International Settlements): Broken by FA in 1941 and read up to 1944.  
- Bank of England Code: Broken by FA in 1941.  
- British Interdepartmental Cipher: Broken by FA and B-Dienst in 1942 but work was stopped due to low traffic.  
- British Merchant Navy Code: Broken by B-Dienst from 1940 to 1943 when the code was replaced. 
- Naval Code: A 5-digit version of this code was broken by B-Dienst in 1935. 
- Royal Navy Administrative Code: Broken by B-Dienst member Wilhelm Tranow. 
- M-94: U.S. Army cipher broken by GdNA early in the war. Replaced by M-209. 
- M-209: Licensed version of the Hagelin C-38 used by the U.S. Army.  
- M-325: Enigma derivative designed by William F. Friedman in 1944.
- State Department Code: Broken by FA. 
Primary Source Finding Aids
Crane CSNG Library
Crane Material, Active Stations
Crane Material, Inactive Stations
Cryptologic Documents in the Navy Department Library
NSA Center For Cryptologic History Finding Aid
NSA OPENDOOR Transfers to NARA, 1996 | Alternate link
NSA Transfers to NARA, 2011
NSA Scientific and Technical Information Collection 1916-1966 Transferred to NARA, 2016 | Excel format
Radio Intelligence Publications