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Chapter 11 : Secure Operations
Chapter 11
Secure Operations
Secure radio operation provides the highest commercially available level of voice security on both
trunked and conventional channels.
By default, the radio automatically enters the encrypted environment without having to manually select
or clear the secure transmission.
11.1
Enabling Secure Transmissions
Prerequisites: Check if the secure feature is enabled or disabled.
Procedure:
1 If secure feature is disabled, enable the secure feature by pressing the Sec menu item.
The display shows
2 Monitor the mode and ensure that it is not in use.
3 To transmit, press the PTT button.
If the selected channel is programmed for clear-only operation, your radio shows the following
indications:
•
A tone sounds.
•
The display shows Clear TX.
NOTE:
The radio does not transmit until you disable the secure mode. The radio can be configured
to ignore clear voice or unsecured transmission when the radio is in secured transmission. For
more information, contact your system administrator.
11.2
Encryption
This chapter explains the encryption feature on your radio.
11.2.1
Multikey Feature
This feature allows your radio to be equipped with different encryption keys and supports the DES-OFB
algorithm.
There are two types of encryption keys:
Conventional Multikey
The encryption keys are strapped on a one-per-channel basis, through Customer Programming
Software (CPS). 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.
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, and the current key.
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