The daily star-mirror. (Moscow, Idaho) 1911-1939, 1923-01-23
device ASSURES
| RADIO SECRECY
May Now Transmit Message
Without Fear of Listeners.
ONLY ONE CHANCE IN MILLION

Dy Use of New Method No Code 10
Necessary, for Sender and Receiver
Can Laugh at Efforts Of Any Inter-
! Ioper to Listen to or Read Their
Conversation-Use PARASITES" to
Deceive Sharps, Making Secrecy
Double Secret.
| Absolute secrecy is now possible in
wireless communications. If they be
made by the new system called
'crypto," invented by Edouard Belin,
the great French engineer, there is not
another wireless operator in the world
who can tune in and read them, writes
Arthur Bennington in the New York
World. Phis is equally true of tele-
graphic or telephone or wireless mes
sages. M
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 1t
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 that the
Germans read ours. These were. 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 be.
A., 81
code is necessary, for sender and re-
ceiver can laugh at the efforts of any
interloper to listen to or read their
conversation.
Secret in Number Lines.
Secrecy is brought about by
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
series of six numbers and must be
remembered by both sender and re-
ceiver. T. These can agree upon any
number they choose and can change
it at will by mutual agreement. 1t Is
something like the mechanism OF q
banks 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
cannot be applied to ordinary wireless
communication. In 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
ana transmitted over wire (tele- |
graphic orytelephonic) to the receiving [
apparatus, which may be situated any
where within the limits of long dis
lance telephone conversation. Here
It 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
1een received at Bar Harbor (Me.)
md Annapolis (Md.) from Paris and at
Paris from Beirut, Syria.
1t is upon the sending and receiving
apparatus that the mechanism for in
'uIIuS ScCfcCy is dpplcu. Ihooc WIZ
lave read the descriptions Of the
3elin apparatus will remember that
he cylinder which receives the photo
,raph must turn at precisely the same
peed as the cylinder at the sending
tation. ~ az
This perfect synchronism is OBJ
aimed automatically by making the
eceiving cylinder revolve minute
raction of second more slowly than
hat of the sending cylinder, and at
he end Of each revolution the latter
tops and sends current of the OPP
osite character. for the same minute
IA ction of second, thus insuring the
bsolutely perfect synchronism of the
tarting OF each revolution, while the
ifference of time in the ending of the
evolution is so mcroscopically small
lat it in no way affects the perfec-
on of the result.
ReouIated bv Chronomerer