Erasing Encryption Keys; Requesting An Over-The-Air Rekey; Mdc Otar (Conventional Only) - Motorola APX Series User Manual

6875947M01-HM
Advanced Features
6.12.3.5

Erasing Encryption Keys

Do one of the following to erase the selected encryption keys. You can use the options interchangeably
depending on your preference and the programmed functions.
If the Multi-system Over-the-Air Rekeying feature is in use, the keys erased are only for the current
secure profile of the selected channel. The erase all option operates as configured by the dealer or
system administrator. Erasing all keys using the Top (Orange) button and the Top Side (Select) button
erases all keys in all keylists in the radio.
Procedure:
• Erasing the selected encryption keys using the radio menu:
a. or to ERAS and press the Menu Select button directly below ERAS.
The display shows the last user-selected and stored encryption key, and the available menu
selections.
b. or to the desired encryption key or use the keypad to enter the number of the desired key.
c. Press the Menu Select button directly below ALL to delete all keys, or press the Menu
Select button directly below SNGL to delete current shown key.
You can abort this screen and return to Home screen by pressing the Menu Select button
directly below ABRT.
6.12.3.6

Requesting an Over-the-Air Rekey

If the Multi-system Over-the-Air Rekeying feature is in use, the rekey request is only for the current
selected secure profile.
Prerequisites: Ensure that the Unique Key Encryption Key (UKEK) or Unique Shadow Key (USK) is
loaded into the radio with the Key Variable Loader (KVL) before the rekey request can be sent. Refer
to your local key management supervisor for more information.
Procedure:
1 or to REKY.
2 Press the Menu Select button directly below REKY.
3 Perform one of the following actions:
• Press the PTT button to send the rekey request.
• Press the PTT button again, or the
in normal mode.
If the rekey operation fails, you hear a bad-key tone and the display shows REKEY FAIL.
NOTICE: The rekey operation failure indicates that your radio does not contain the UKEK
or USK.
6.12.3.7

MDC OTAR (Conventional Only)

This feature allows you to view or define the Motorola Data Communications (MDC) Over-the-Air
Rekeying (OTAR) features. It is applied only when operating in secure encrypted mode. In addition to
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or Emergency button, to exit the feature and transmit