Abhorchdienst

The Abhorchdienst (i.e. "Listening Bureau") was a German code-breaking bureau which operated during the final years of the First World War. It was established in 1916 and was composed mainly of mathematicians.[1] Other countries, such as France and Austria-Hungary, had set up similar organisations at an earlier stage, but the military context did not necessitate the development of the German bureau until 1916.[2]

References
  1. Adams, Jefferson (2009). Historical dictionary of German intelligence. Scarecrow Press. p. 1.
  2. Singh, Simon (2010). The Code Book: The Secret History of Codes and Code-breaking. HarperCollins.
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