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3 8
R E S T R I C T E D
6.3 Keysetting
On-line decryption of SPECAT messages is not possible, even
when the SPECAT key is inserted and turned in the SPECAT
lock. (The very nature of this type of message is against on-line
deciphering and leaving the SPECAT key in the lock.)
Crypto tapes can be transmitted without actuating the shunt
device after at least 15 consecutive crypto groups have passed
the tape reader so that the fact is established that indeed a crypto
tape in the correct format is being transmitted (only in a half-
duplex line mode).
When a message is deciphered on-line, the page copy will not show
whether or not it has been transmitted in crypto. Therefore the
serial number and checkword belonging to the key with which
it was deciphered are printed after the end of every on-line de
ciphered message. At the transmitting end, the text between the 2
groups of 10 slants (//////////) is the text which actually was trans
mitted in crypto; this can be seen from the page copy.
1. Push OFF-LINE button - lamp lights up, paper is illuminated
2 . T u r n I N S E R T k e y - A R O F L E X p r i n t s I N S E R T
3. Type compartment address,
system indicator, key and
checkword.
4. Remove INSERT key
5 . P u s h O U T b u t t o n - A R O F L E X r e t u r n s t o s t a n d b y
mode.
RESTRICTED
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