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

Originally posted on Of Glass & Paper:
“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…

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