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The Sprach-Morse Generator, the machine mistaken for a young girl speaking in German. Swedish Rhapsody was a Polish numbers station, operated by the Ministry of Public Security (later Office of State Protection and Foreign Intelligence Agency) that used AM broadcasting and operated between the late 1950s and 1998. [2]
SIGABA systems were closely guarded at all times, with separate safes for the system base and the code-wheel assembly, but there was one incident where a unit was lost for a time. On February 3, 1945, a truck carrying a SIGABA system in three safes was stolen while its guards were visiting a brothel in recently liberated Colmar, France .
There is some speculation that the CX-52 might have been broken by the signals intelligence services of Communist East Germany, Czechoslovakia, and Poland. [2]Many of the C-52 and CX-52 machines sold by Crypto AG were compromised to benefit the US and British national signals intelligence agencies, National Security Agency (NSA) and Government Communications Headquarters (GCHQ), respectively. [3]
A numbers station is a shortwave radio station characterized by broadcasts of formatted numbers, which are believed to be addressed to intelligence officers operating in foreign countries. [1] Most identified stations use speech synthesis to vocalize numbers, although digital modes such as phase-shift keying and frequency-shift keying , as well ...
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The SZ40 μ 61 motor wheel stepped every time but the μ 37 motor wheel stepped only if the first motor wheel was a '1'. The ψ wheels then stepped only if the second motor wheel was a '1'. [ 19 ] The SZ42A and SZ42B models added additional complexity to this mechanism, known at Bletchley Park as Limitations .
The M-209. In cryptography, the M-209, designated CSP-1500 by the United States Navy (C-38 by the manufacturer) is a portable, mechanical cipher machine used by the US military primarily in World War II, though it remained in active use through the Korean War.
Klaus Fuchs, exposed in 1950, is considered to have been the most valuable of the atomic spies during the Manhattan Project.. Cold War espionage describes the intelligence gathering activities during the Cold War (c. 1947–1991) between the Western allies (primarily the US and Western Europe) and the Eastern Bloc (primarily the Soviet Union and allied countries of the Warsaw Pact). [1]