Cryptanalysis of the Enigma by the letters on the top row of the Enigma keyboard. So, "continuation of message sent at 2330" was represented as "FORTYWEEPYYWEEPY". "Cribs" were fundamental to the British approach to solving Enigma keys, but guessing the plaintext for a message was a highly skilled business. So in 1940 Stuart Milner-Barry set up a special "Crib Room" in Hut 8. Foremost amongst the knowledge needed for identifying cribs was the text of previous decrypts. Bletchley Park maintained detailed indexes of message preambles, of every person, of every ship, of every unit, of every weapon, of every technical term and of repeated
German code breaking in World War II 1941. While the Germans appreciated the gift from their ally, they did not explain that they were already able to read "Black" code messages. In general, however, German performance in code breaking was weak due to the fragmentation of responsibility and specialized personnel. The Navy's "B-Dienst" was an exception to the rule, although its successes largely ended when the Allies began using more sophisticated encryption methods by 1943. German code breaking in World War II German code breaking in World War II achieved some notable successes cracking British Naval ciphers until well into the fourth year of the war, but