Making the Enigma ciphers for the film "Enigma"
Codes and Ciphers
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Constructing a Menu for the Turing Bombe.
There are three messages, BRF, BZR and BFQ which have a vertical overlap
between the turnover points for wheels 1 and 3, so start with this area.
At offset "t" (along the top alphabets), in BRF, D -> U. In BFQ, A -> U.
Also at offset "v" in BFQ, A -> V and in BZR, K -> V.
Thus remembering that K -> V is equal to V -> K, then:
D - U - A - V - K is a connected fragment
of a menu.
So here is the first stage of
the menu with the other letter pairs
included..But no loops!
Surprise, surprise, the last message, BDG,
gives the link F -> D and at last a strong
Menu for the Bombe.
The Menu information is passed to the Bombe
room as four letter groups. The first two
letters are the letters involved, the next two
letters are the offset.
This Menu then reads:
UAFT AVFV VKZU GKET KFSS FDEU DUST FSFS SXEU YSZT.
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|This page was originally created by the late Tony Sale
the original curator of the Bletchley Park Museum