4-6
Voice Scrambling/Encryption
4-6-2
Encryption Setup
Activating Encryption
P25 radios have the ability to use DES or AES
encryption. To enable encryption, you will need a
CKR (Common Key Reference). The KVL 3000
Plus key loader from Motorola creates this key.
¾
Obtaining a CKR from the KVL 3000 Plus
Keyloader
9
Press Enter. This CKR (TEK) is now stored in the
KVL and can be loaded into the radio using the
loading instructions detailed below.
Press Escape on KVL.
¾
Loading a Pre-loaded Key into your Radio
1
C
t
di t th KVL ith OPC 1534
Keyloader
The following operation is for AES and DES
upgraded radios. A newly upgraded radio will not
encrypt/de-encrypt until you load a new CKR (also
known as TEK—Traffic Encryption Key) to the
radio.
▒
Important: Not all KVL 3000 Plus keyloaders work
▒
with APCO P25 encryption. When the keyloader is
1
Connect your radio to the KVL with OPC-1534.
2
On the radio, press and hold P0 and P1, and then
OCP-1534
KVL
3000
▒
yp
y
▒
powered up, the display will show ASTRO ® 25 if
▒
it can be used for P25 encryption.
¾
Entering a New CKR (TEK) into the KVL
1
Using the soft keys just below the display in the
KVL, select the following in sequence:
• Keys
power up the radio. The display shows KEY
WAITING.
3
Using the soft keys just below the display in the
KVL, select the following in sequence:
• Target
• Load
• Key
y
• New
2
Enter the new key (CKR). This will be 5
numbers:”0” and any number between zero and
4095 (ex: 03456).
3
Press Enter.
4
Choose the algorithm AES or DES using the left
right arrows (
◄
or
►
) if the KVL is enabled for both
4
Using the left/right arrows (
◄
or
►
), select the
preprogrammed CKR (TEK).
5
After the proper CKR is on the KVL Screen, press
the soft LOAD key. The radio display flashes until
loading is complete. The radio will accept as
many as 16 CKR numbers.
¾
Programming the Radio Cloning Software
right arrows (
◄
or
►
), if the KVL is enabled for both
algorithms. Otherwise, proceed to step 6.
5
Press the soft key to Accept.
6
Create a key ID by entering 4 identifying
numbers from the keypad. This number is for
dealer reference only.
7
Press Enter.
¾
Programming the Radio Cloning Software
1
Connect your radio to a computer with OPC-
1122U.
2
Open your cloning software and read the radio.
3
In Memory CH » Encryption, select TX/RX.
4
In Memory CH » Encryption, enter the CKR (TEK)
that was loaded in the KVL.
8
At the “Byte” prompt, enter a random set of
numbers until the display shows SLOT FILLED.
This may take from 30 to 60 numbers depending
on the algorithm.
5
In Digital » Option, ensure that the Preamble
Length is 0~255. (120 is recommended).
6
In Common » Key & Display, assign a
programmable button for Encryption.
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