TheCodeBreakers
checked his work with new data from the traffic of May 27, found it was
correct, and within two weeks of undertaking the job had solved the
cipher. A Swedish mechanic constructed an apparatus to Beurling's
specifications, and though it looked monstrous and made a terrific
racket, it printed out the German messages that the Swedes wanted to
read.
To recover the daily keys, the cryptanalysts would work through the
night, and in the morning, when the Swedish commander, Lieutenant
General Olov Thornell, came in to ask, "What's the news from the
Germans today?" they were usually able to tell him. Twice when the
Germans made threatening moves with their troops in Norway toward
Sweden, Swedish troops, alerted by crypt-analyzed messages, moved
swiftly into position and blocked the Germans. Their commander,
General Niklaus von Falkenhorst, later extended congratulations to
Thornell on the brilliance of his tactics. Thornell passed the felicitations
on to the cryptanalysts.
annaabi.ee 
