Managing Encryption; Loading Encryption Keys; Multikey Feature; Selecting Encryption Keys - Motorola APX 2500 User Manual

6.11.3

Managing Encryption

This chapter explains the encryption feature on your radio.
6.11.3.1

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 Keyloading 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 Keyloading.
2 Press Target → Load.
3 Perform one of the following actions:
• For single key, select Key.
• For multikey, select Group.
4 Select the required keys and press Load on the KVL.
The KVL indicates that keyload is successful.
6.11.3.2

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.
6.11.3.3

Selecting Encryption Keys

Procedure:
1 or to Key.
68012006035-EM
Chapter 6: Advanced Features
73