Erasing Encryption Keys; Requesting An Over-The-Air Rekey; Mdc Otar (Conventional Only) - Motorola SRX 2200 User Manual

68012005050-FY
Chapter 7: Advanced Features
7.11.3.3

Erasing Encryption Keys

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 single key in radios with the single-key option and erasing all keys in radios with the multikey
option by using the preprogrammed Top Side (Select) button and Top (Orange) button:
a. Press and hold the Top Side (Select) button.
b. While holding Top Side (Select) button down, press the Top (Orange) button.
The display shows PLS WAIT. When all the encryption keys have been erased, the display shows
ALL ERASED.
NOTE: Do not press the Top (Orange) button before pressing the Top Side (Select) button,
unless you are in an emergency situation as this sends an emergency alarm.
7.11.3.4

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:
Press and hold the preprogrammed Rekey Request button to send the rekey request.
If the rekey operation fails, a bad-key tone sounds and the display shows RKY FAIL.
NOTE: The rekey operation failure indicates that your radio does not contain the UKEK or USK.
7.11.3.5

MDC OTAR (Conventional Only)

This feature allows you to view or define the Motorola Data Communications (MDC) Over-the-Air Rekeying
(OTAR) features. This feature is applied only when operating in secure encrypted mode. In addition to Rekey
Requests, OTAR transmissions include Delayed Acknowledgments, and Power-up Acknowledgments.
Some of the selected options require configuration at the Key Management Controller (KMC) site to work
properly.
NOTE: This feature must be programmed by a qualified radio technician. For more information, contact
your system administrator.
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