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6.9.3
Managing Encryption
This chapter explains the encryption feature on your radio.
6.9.3.1
Loading Encryption Keys
Prerequisites:
•
Refer to the Key Variable Loader (KVL) manual for equipment connections and setup.
Procedure:
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.
NOTICE:
If the Multi-system Over-the-Air Rekeying feature is in use, the ASTRO profile name is
displayed below KEYLOAD.
2 Select the required keys and press Load on the KVL.
The KVL indicates that keyload is successful.
6.9.3.2
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 emergency talkgroup. You can
have operator-selectable key erasure.
6.9.3.3
Erasing Encryption Keys
Procedure:
•
Erasing the single key in radios with the single-key option and erasing all keys in radios with the
multikey option by using the preprogrammed Top Side (Select) button and Top (Orange)
button:
a. Press and hold the Top Side (Select) button.
b. While holding Top Side (Select) button down, press the Top (Orange) button.
The display shows PLS WAIT. When all the encryption keys have been erased, the display
shows ALL ERASED.
MN006727A01-AA
Advanced Features
55
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