E.F. Johnson Company 5100 ES, Operating Manual

Page: 178 / 212

11-4 ES Series Models II/III Portable Radio Operating Manual
Secure Communication (Encryption)
11.2.2 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 this mode is selected, keys are loaded using a SMA (System Management
Assistant), a Motorola KVL-3000 or KVL 3000 plus. (Please note that
EFJohnson radios
have not been tested with the Motorola KVL 4000: therefore, the KVL 4000 will
not work with EFJohnson radios.)
Which then OTAR can be achieved by loading the
corresponding UKEKs. The PID range 1-64 in the Keys Table must then be programmed
to link channel PIDs to a specific SLN (Storage Location Number or CKR (Common Key
Reference) and the range is 1-4095 (see Figure 11.1).
Figure 11.1 Key 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 0-63
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 when either OTAR (Over-The-Air-
Rekeying) 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 with the Motorola KVL-3000 Plus. With this
mode, keys are loaded into a SLN (Storage Location Number), typically from 0-4095.
The 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 11.1, 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