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SPLIT CLICHE :
A set of two or more code-groups which tend to recur, not consecutively
but at a more or less regular distance from each other.
SPOTTY :
(of a cipher text). Faulty or corrupt.
SQUARE :
1. The arrangement of 25 letters in a square, or one of several such
arrangements, constituting the key or part of the key of a Playfair
cipher system.
2. Any one of the compartments of a transposition cage into which a
single letter is written.
3. A short key or piece of key or a table of key-groups for reciphering
indicators printed, or regarded as printed, in a square or
rectangular form.
SQUARE, v :
To reconstruct the square or squares used in Playfair cipher
system.
SQUARE COUNT :
A count made on a square of squared paper each line of which
corresponds to a different first letter or number of a bigram and
each column to a different second letter or number; each entry has
thus two co-ordinates. cf. Foss sheet.
S.S. :
Short for Self-steckered.
S.S.S. :
STAB :
(of German cipher keys). Used for "staff" messages. cf. Offizier.
STAGGER, n :
Occurrence of the same clear passage or the same code groups at
almost but not exactly the same point in each of two cipher, or
messages which are in depth with each other.
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