Black Chamber
American cryptanalytic organization / From Wikipedia, the free encyclopedia
For the postal monitoring office, see Cabinet noir. For the song by Blind Guardian, see Somewhere Far Beyond.
The Black Chamber, officially the Cable and Telegraph Section and also known as the Cipher Bureau,[clarification needed] was the first peacetime cryptanalytic organization in the United States, operating from 1917 to 1929. It was a forerunner of the National Security Agency (NSA).
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