The 1944 Bletchley Park Cryptographic Dictionary
Codes and Ciphers
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2. Action or process of identifying right-hand and middle wheels of an Enigma machine by relating distances or intervals between message settings (as found by placing in depth, e.g. pairs of messages having the first letter of that setting, as enciphered on the Grundstellung, the same and one or both of the other two letters different) to the possible intervals between the enciphered settings, noting and scoring all possible partial alphabets so obtained, eliminating contradictions, and so fixing position of turn-overs (which serve to identify the wheels).
BANBURISMUS MENU :
2. (of results). Produced or obtained by the use of Banburies.
BANBURY, v :
2. Values arbitrarily assigned to code-groups when the true figures
are not yet determined, such that the assigned value differs
from the true by an amount which is constant for each group,
and therefore the differences between groups is a true difference.
(Usually distinguished from sense 1 by the words arbitrary,
common, or provisional).
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