User's Manual

Viking™ VP600 Portable Radio Operating Manual 8-3
Secure Communication (Encryption)
8.2.1 Key and Algorithm IDs
Each encryption key is programmed with a Key ID (also called Logical ID). This ID plus
the algorithm ID (ALGID) is transmitted in the message on digital channels. The radio
receiving the message must have a key with the same IDs in order to decrypt it.
8.2.2 PID / SLN Key Management Modes
Note The term “SLN” from the Project 25 specification is equivalent to “CKR” (Common Key
Reference) also used to define this parameter.
When PID mode is selected, keys are loaded using a Motorola KVL-3000 or KVL 3000
plus. When SLN mode is selected, keys are loaded using a SMA (System Management
Assistant) or Motorola KVL-3000 and 3000 plus optioned for Astro 25. OTAR can then
be achieved by loading the corresponding UKEKs. The PID range 0-125 in the Keys
Table must then be programmed to link channel PIDs to a specific SLN (Storage Location
Number) or CKR (Common Key Reference). The range for SLNs is 1-4095 (see Figure
8.1). The Viking Portable supports two keysets, allowing for a total of 252 keys in two
keysets.
Figure 8.1Key Selection Example
More information on the PID or SLN key management modes follows.
PID Mode - When this mode is selected, keys are loaded directly into a PID of 0 to 125
that corresponds to the PID programmed for each channel (if applicable). Since the
EFJohnson Technologies System Management Assistant (SMA) does not support PID
mode: PID mode can be used only when keys are loaded using the Motorola KVL-3000
or KVL-3000 Plus keyloader.
Algorithm ID
Keyset Name (Opt)
SLN 23
SLN 25
Algorithm ID
Keyset Name (Opt)
Key #21: Key ID 54
SLN 24
SLN 22
SLN 21
Keys Table
3
5
4
2
1
PID
Key #22: Key ID 65
Key #23: Key ID 67
Key #24: Key ID 69
Key #25: Key ID 73
Key #25: Key ID 90
Key #24: Key ID 91
Key #23: Key ID 99
Key #22: Key ID 98
Key #21: Key ID 94
Keyset 1
Keyset 2
Zone 1, Chan 2
Zone 2, Chan 4
Zone 2, Chan 5
Zone 3, Chan 1
Zone 3, Chan 2