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ROBINSON :
(in Tunny). One of the high-speed machines (primarily designed
to make counts and comparisons on any desired period) used to
apply Tutte's method for the determination of unknown chi-wheel
patterns and for the setting of chi-wheels whose patterns are
known, by reading simultaneously two consecutive letters on each
of two teleprinter tapes (one being that of a cipher message the
other that of the two selected chi-wheels) by photo-electric
means, combining and comparing the readings by suitable electric
apparatus, and recording the counts for different settings by
means of a printing attachment. Cf. Bedstead.
ROD :
Strip of wood or other suitable material ruled off in equal
compartments, used e.g. in solving simple transposition ciphers;
a similar device bearing a wheel-pattern or a cipher-machine or
other key component of a cipher used for setting messages (see
also direct rod, inverse rod).
ROD OUT :
To set (a message) and so, in Enigma, break (a key) by using rods
or a rod square.
ROD-PAIRING :
(in Enigma). An association of two direct rods or of two letters
at the same position on a pair of inverse rods, determined or
suggested by an unsteckered constatation, especially in the process
of setting a message.
ROD-POSITION :
(in Enigma). Position of the wheels of an Enigma machine corresponding
to the rods of the wheels concerned and indicated by the letters
(or figures) which would appear in the windows if the ringstellung
were set at Z (i.e. zero) for each wheel.
ROD-SQUARE :
Square of 26 letters by 26 (or rectangle 26 by 52) formed by the
Direct or Inverse Rods of a particular Enigma wheel arranged in order.
ROD-UPRIGHT :
A vertical column of a Rod-square, (representing the wiring of the wheel).
ROUTE :
Scheme of order or direction in which characters are written, read, or
otherwise dealt with, especially order in which characters are written
into, or taken out of, the cage in transposition.
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