Cipher Bureau may refer to:
- Cipher Bureau (United States), aka Black Chamber (1919–1929), the US government's first peacetime cryptanalytic organization
- Cipher Bureau (Poland) (Biuro Szyfrów), the interwar Polish unit charged with signals intelligence, cryptography and cryptanalysis that broke the German cipher machine Enigma
- Cipher Bureau (film), a 1938 American film
This disambiguation page lists articles associated with the title Cipher Bureau.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: