Military and intelligence history mostly dealing with World War II.
Friday, February 17, 2012
I uploaded file ADM 1/27186 – ‘Review of security of naval codes and cyphers 1939-1945’. It mentions in great detail the code systems used by the RN, prior and during the war and the success that the German B-Dienst had against each one. Very interesting file! (139 pages, 48Mb)