Philips SPENDEX 40 Operating Manual page 4

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Abbreviations
C I K C r y p t o I g n i t i o n K e y
D T E D a t a Te r m i n a l E q u i p m e n t
E K D E l e c t r o n i c K e y D i s t r i b u t i o n
I D I d e n t i fi c a t i o n
I V S N I n i t i a l Vo i c e S w i t c h e d N e t w o r k
K D C K e y D i s t r i b u t i o n C e n t r e
P t t P r e s s t o t a l k
STU-II Secure Telephone Unit (second generation)
D e fi n i t i o n s
CIK module:
Programmed module, unique per terminal, required for crypto operation.
Electronic Key Distribution:
A system by which key variables are generated and then transmitted by
electronic means.
ID Number:
5-digit number, unique per terminal, assigned to those terminals that can
operate in the KDC mode.
KDC Call Variable:
Key variable for normal use, issued by the Key Distribution Centre for
producing encrypted traffic with a terminal of type SPENDEX 40 or STU-II.
KDC Unique Variable:
Key variable, unique per terminal, required for the decryption of a KDC call
v a r i a b l e .
Key Distribution Centre:
Central unit which can issue a call variable on request.
Net Variable:
Key variable for producing encrypted traffic with a terminal of type
SPENDEX 40 or STU-II. The Net variable shall be used only for emergency cases
if for some reason or other no KDC call variables are available.
Secure Telephone Unit:
Speech encryption/decryption terminal of the type TSEC/KY-71A.
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