#AtoZChallenge: April 24 – U is for “Ultra”

“Ultra was the designation adopted by British military intelligence in June 1941 for wartime signals intelligence obtained by breaking high-level encrypted enemy radio and teleprinter communications at the Government Code and Cypher School at Bletchley Park.” The deciphering of messages generated by the enemy’s Enigma machines for land and naval forces was, by all accounts, … Continue reading #AtoZChallenge: April 24 – U is for “Ultra”