• The
Secure/Clear
switch only applies when the
radio is transmitting.
Managing Encryption
This chapter explains the encryption feature on your radio.
Loading an Encryption Key
NOTICE:
Refer to the key-variable loader (KVL) manual for
equipment connections and setup.
1
Attach the KVL to your radio.
The display shows
KEYLOAD
, and all other radio
functions, except for power down, backlight, and
volume, are locked out.
2
Select the required keys and press the
Menu Select
button directly below
LOAD
on the KVL.
This loads the encryption keys into your radio.
When the key has been loaded successfully, one of the
following scenarios occurs:
• You hear the radio sounds a short tone for single-key
radios.
• You hear the radio sounds an alternating tone for
multikey radios.
The KVL indicates that keyload is successful.
Multikey Feature
This feature allows the radio to be equipped with different
encryption keys and supports the DES-OFB algorithm.
There are two types of encryption keys:
Conventional Multikey
The encryption keys are strapped on a one-per-channel
basis, through CPS. In addition, you can have operator-
selectable keys, operator-selectable keysets, and
operator-selectable key erasure. If talkgroups are
enabled in conventional, then the encryption keys are
strapped to the talkgroups.
Trunked Multikey
If the radio is used for both conventional and trunked
applications, strap the encryption keys for trunking on a
per-talkgroup or announcement-group basis. In
addition, a different key can be strapped to other
features, such as dynamic regrouping, failsoft, or
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