Draft 02 - Sep 1 2015
7-4
Viking Mobile Radio Operating Manual
Secure Communication (Encryption)
7.2.2
PID / SLN Key Management Modes
The channels, talkgroups, and other calls that use encryption are linked to a specific
Physical ID (PID) when the radio is programmed. For example, Zone 1, channel 1 could
be programmed to select the key in PID 1 and Zone 1, channel 2 could select the key in
PID 3. The PID ranges are 0-125 when the PID mode is selected, and 1-126 when the SLN
mode is selected (see Figure 7.1).
Figure 7.1
Key Selection Example
PID or SLN key management modes can be programmed on the
Global
programming
screen. More information on these modes follows.
PID Mode
- When this mode is selected, keys are loaded directly into a PID of 0-125
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.
SLN Mode
- The SLN mode must be selected if either Over-The-Air-Rekeying
(OTAR) or the EFJohnson Technologies System Management Assistant (PDA
keyloader) is used. It can also be used if OTAR is not used. SLN mode is digital
encryption, and can also be used with the Motorola KVL-3000, KVL-3000 Plus, and
KVL-4000. With this mode, keys are loaded into a SLN (Storage Location Number),
typically from 0-4095. A Keys Table must then be programmed to link channel PIDs to
a specific SLN.
The use of this type of indirect linking allows keysets and key IDs to be changed
through OTAR while keeping the mapping from the channel or talkgroup the same. For
example, as shown in Figure 7.1, PID 4 selects SLN 24 which selects key slot 24 in both
keysets. This slot contains Key ID 69 in Keyset 1 and Key ID 91 in Keyset 2. Only one
keyset is active at a time. The actual key chosen between these two to transmit with will
depend on which keyset is active, Keyset 1 or Keyset2.
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
