Wauwatosa news. [volume] (Wauwatosa, Wis.) 1900-1948, 1916-03-10


she desk between himself and Helen
Bertel. The sheet bore what was
seemingly a meaningless tumble of
typewriter letters, after this fashion:
NEUTRALITY-SUSPICIOUS.
NEUTRALITY-SUSPICIOUS.
Observation-Disclosures
OBSERVATION-DISCLOSURES
OBSERVATION-DISCLOSURES
NEUTRALITY-SUSPICIOUS..
And you can't find the weak
placer" asked the girl-'the joint in
Its armor?"
For Hazard had descanted at consid-
cradle length on the principles of
cryptcgraphy, or secret writing, point
ing out the number of weaknesses that
render all such writings susceptible of
Interpretation when one diligently and
intelligentIy sets himself to the task
of bringing to light their hidden mean
ing.
''Cryptography is a fascinating
study" averred Hazard discursively,
leaning back and rumpling his hair.
But no system has ever been de-
vised that meets all requirements.
The principles by which most ciphers
are solved have been given good
deal of study and have been so
classified that the expert usually
has pretty plain sailing when he
brings himself to the task of reading
a message not intended for his eyes.
Poes Gold Bug holds the interest
almost solely by description of the
solution of a cryprogram, and the
same is true of Sherlock Holmes So
luton of the dancing men cipher.
These two examples, however, are
about the simplest forms of cipher
writing"
The speaker abruptly banged the
open sheet or his desk with his palm.
This thing, though, is not going
to be easy to interpret | believe it
is based upon what is known as the
Key-Square system; but as it is one
that lends itself to innumerable yaria-
1ions and combinations, only time and
1aborious effort are going to give us
the clue we need-unless, indeed, we
should stumble upon it accidentally"
Helen Bertels fine gray eyes slowly
took stock OF the mans outward evil
dences of turbation-rumpled hair,
wrinkled clothing, disarranged tie,
three days growth Of beard-and her
expression softened.
She consulted second sheet of
paper that lay upon the desk, which
bore numerous memoranda. Said she:
IF the fixed rules for deciphering
cryptograms amount to anything at
all, / don't see why they shouldn't
apply to every case You tell me that
j. is the letter most frequently used,
r next, and then come in the follow
ing groups, arranged according to
their respective degree of frequency:
AONI; RSH; DL; CWUM; FYGPB;
WK: XQJZ. We know that all words
of single letters must be A, l or o, and
that the double letters that occur
most frequently are EE, 90, FF, LII.
and S. Am / correct so far?"
Hazard nodded 60 on" he en-
couraged.
Next, then, the commonest words
of two letters, according to their fire.
quence, are: of, to, in, it, is, be, he, by,
or, as, at an, So Disregarding the,
which is almost never used in ciphers,
'and' and are lead the words of three
letters, then follow"
Hazard glumly broke in
Never mind the words of four let
ters. Did you apply all these tests to
this eipher?"
Helen signified that she had. And
the result was quite as silly and mean
fngless as it already is. she added
THE reason is not hard to find"
Hazard explained This cipher
doesn't contain enough repetitions of
lettergroups to suggest anything at
all; none of the commonest words are
even remotely suggested; and as for
j., or T. or any of the rest, che is
not justified even in guessing at a
letter. All this signifies that a sys-
TEN has been used that avoids repeti-
tions,
Such system is the so-called Key
Square. If it has been used my work
Is all cut out for me-
The Key-Square." repeated the girl
what is it?'
With his pencil Hazard drew a
square containing twenty-five smaller
squares. In each of the latter he in
scribed a letter of the alphabet. At
the top of each of the FIVE vertical
columns he wrote numeral-1, 2, 3,
4 and sand likewise at one end Of