Arne Beurling, a street homeless man, painting by Otto Dix.

 

=Beurling himself never described how he managed to crack the code. When asked,
his answer was evasive: “A magician never reveals his tricks.” One important clue is that
when the T 52 was used in traffic it was common for the operator to insert an alpha shift
(the character in the teleprinter traffic indicating a switch from numbers to letters) at each space to avoid it getting stuck in the number mode. This meant that the combination
alpha shift + space was very common. Carl Gösta Borelius, who himself worked on the
T 52 traffic during WW II, has written a credible explanation showing that this was most
likely Beurling’s approach in his code breaking work.=

 That's what a real hacker looks like