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Data collection / Call sign / Signals intelligence / Traffic analysis / Amateur radio / Signage / ITU prefix / Call signs in North America / Espionage / National security / Broadcast law
Date: 2013-03-04 17:01:47
Data collection
Call sign
Signals intelligence
Traffic analysis
Amateur radio
Signage
ITU prefix
Call signs in North America
Espionage
National security
Broadcast law

German exploitation of Russian communications through Traffic Analysis during World War II Prepared under the direction of the CHIEF, ARMY SECURITY AGENCY 1 May 1946 WDGAS-U [Declassified and approved for release by NSA

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