74
Special Radio Features
Managing Encryption
Key Loading
Refer to the key-variable loader (KVL) manual for equipment 
connections and setup.
Multikey
The multikey feature allows your radio to be equipped with as many 
as 48 different encryption keys and supports the DES-OFB algorithm.
• Conventional Multikey – The encryption keys can be tied 
(strapped), on a one-per-channel basis, through radio service 
software. In addition, you can have operator-selectable keys, 
operator-selectable keysets, and operator-selectable key erasure. 
If talkgroups are enabled in conventional, then the encryption keys 
are strapped to the talkgroups.
The radio will not transmit until you set the Secure/
Clear switch to the secure position (L).
1 Attach the KVL to your radio. 
When it is attached, the 
display will show
 
KEYLOADING, and all other 
radio functions, except for 
power down, backlight, and 
volume, will be locked out.
2 Press the PTT button on the 
KVL. This will load the 
encryption keys into your 
radio. When the key has 
been loaded successfully, 
the radio will sound a short 
tone for single-key radios; for 
multikey radios, an 
alternating tone will be 
heard.
KEYLOADING
94C26_XTS5000Mdl2.book  Page 74  Friday, June 25, 2010  5:23 PM