The Pleasantville press. (Pleasantville, N.J.) 1912-1929, 1923-02-03

ConVersation-Use "Para5ites" to
Deceive Sharp, Making Secrecy
Double Secret.
Absolute secrecy is now possible in
wireless communications. If they be
made by the new system called
cryptic invented by Edouard Belin,
the great French engineer, there is not
another wireless operator in the world
Who can tune in and read them, write.
Arthur Bennington in the New York
World. This is equally true of tele-
graphic or telephone or wireless mes
sages.
The great defect of wireless com
munication hitherto has been the
possibility that some one-any one
other than the person for whom the
message is designed can watch for it
and receive it. During the war all
nations became keenly aware of this
essential defect, for the allies used to
read the German wireless dispatches
constantly and it is certain hal the
Germans read ours. These We're. of
course, sent in code, but both sides had
code experts and learned very soon to
read each others codes. no matter
how complex these might he.
BY the use OF the new method no
code is necessary, for sender and re-
eeiver can laugh at the efforts of any
interloper To listen to or read their
conversation.
Secret in Number Lines.
Secrecy is brought about by a
simple apparatus which, however, is
exceedingly difficult to explain. al
though understandable in a few sec
onds when seen in operation. All is
purely mechanical and automatic
that is, all but the key. This is a
series of six numbers and must be
remembered by both sender and re-
celyer. These a agree upon any
number they choose and can change
ii at will by mutual agreement. 1t is
something like the mechanism of "A
hanks safe, which is set at a certain
number and only those who know the
number can open the door.
The use Of this secrecy presup-
poses the employment of the Belin
apparatus for sending pictures. 1t
canno be applied to ordinary wireless
communication. III the Belin system
the message to be sent is written and
signed with the autograph of the
sender. This is placed upon the cylin-
der of the portable sending apparatus
and transmitted I'VE a wire (tele-
-gulnhie CT telephapic}-to t~heJreceiying
apparatus, which may be situated any
where within the limits of long dis
tanee telephone conversation. Here
Il is automatically reproduced in eX-
act facsimile of the original. 1t may
be sent by wireless to an almost equal
distance. Such messages have already
been received at Bar Harbor (Me.)
and Annapolis (Md.) from Paris and at
Paris from Beirut, Syria.
Ii is upon the sending and receiving
apparatus that the mechanism for in
surfing secrecy is applied. Those who
have read the descriptions of the
Belin apparatus will remember that
the cylinder which receives the photo
graph must turn at precisely the same
speed as the cylinder at the sending
station.
This perfect synchronism is OBJ
tanned automatically by making the
receiving cylinder revolve a minute
Fraction of a second more slowly than
fiat of the sending cylinder, and at
tie end Of each revolution the latter
stans and sends a current of the op-
posite character for the same minute
fraction OF a second, thus insuring the
absolutely perfect s~ynchronism of the
starting of each revolution. while the
difference of time in the ending of the
revolution is so microscopically small
that ii in no way affects the perfec-
tion of the result.