Alan Turing. Famous Mathematician
In 1932 Alan published the most
significant mathematical papers ever "On compatible numbers,
with an application to the Entscheidundsproblem(the problem
of the decidability)". The code is the word that you have
like war you just use the next letters in the alphabet so
the code would be xbs. At the very end of 1938,the Germans
increased the number of rotors that could be chosen by an
Enigma operator from 3-5. There were know not 6 but 60
possible combinations of rotors. Decoding them would require
a " Bombe" with 60 machines- to many to be
practicable.