Motorola MTP850 User Manual page 132

DMSCK Validity
From the main menu, select Security > DMSCK Validity.
SCK (Static Cipher Key) is a secret key the infrastructure
uses to encrypt call and data in the system.
Air interface encryption provides service confidentiality
between your MTP850 and the system. Your MTP850 is
provided with a set of SCKs.
To verify SCK validity for DMO, press Select. The display will
show one of the following messages:
• DMSCK is Valid
DMO.
• DMSCK is Invalid
in DMO. Please call your Service Provider to restore SCKs
to your MTP850.
DMO SCK
From the main menu, select Security > DMO SCK.
Key version is displayed when you select the option.
Air Interface encryption provides service confidentiality
between your MTP850 operating in Direct Mode and another
terminal or a group of terminals operating in Direct Mode.
You can change the current key, if the key change operation
is allowed by your Service Provider.
To change the key, if not in a call, select Next. The display
will show the following message: Change to version...
• Select Yes to change the key. Key version changed
display will appear.
• Select No to leave the key. Key version display will
appear.
124
your MTP850 can work encrypted in
–
your MTP850 cannot work encrypted
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