Chapter 7 Encryption; Load An Encryption Key; Multikey Feature; Select An Encryption Key - Motorola Astro XTS 4000 Service Manual

Chapter 7 Encryption

This chapter provides procedures for using the encryption capability of your radio. The following
procedures are outlined:
• Loading an encryption key
• Selecting an encryption key
• Selecting an Index
• Erasing an encryption key
7.1

Load an Encryption Key

To load an encryption key:
1. Refer to the key-variable loader (KVL) manual for equipment connections and setup.
2. Attach KVL to the bottom connector of the radio using Keyload cable 0182297T15. The
display shows "KEYLOADING." All other radio functions, except for power down, backlight, and
volume, are locked out.
3. Refer to the KVL manual for how to load the encryption keys into the radio.
4. When the key is loaded successfully, you will hear:
• On single-key radios – a short tone.
• On multikey radios – an alternating tone.
7.2

Multikey Feature

This feature allows the radio to be equipped with multiple encryption keys. It can support up to two
different encryption algorithms simultaneously (e.g., DVP-XL and DES-XL).
• Conventional Multikey – The encryption keys can be tied (strapped), on a one-per-channel
basis. In addition, the radio can have operator-selectable keys, operator-selectable indices, 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; for example, dynamic regrouping, failsoft, or
emergency talkgroup. The radio can have operator-selectable key erasure.
7.3

Select an Encryption Key

You can select an encryption key using either the menu or the keypad.
7.3.1 Use the Menu
To select an encryption key using the menu:
1. Press Right Navigation Button until the display shows "KEY."
2. Press Left Menu Select Button, Middle Menu Select Button, or Right Menu Select
Button, directly below "KEY." The display shows the last user-selected and stored encryption
key, as well as the available menu selections.