4.6.4
K Validity
Key (K) is a secret key the infrastructure uses to authenticate the radio in the system. It is part of the
authentication that provides service confidentiality between your radio and the system.
4.6.4.1
Verifying K Validity
Procedure:
1
From the home screen, press the
Menu
key.
2
Select
Security
→
K Validity
.
Your radio displays:
•
K is Valid
– The infrastructure can authenticate your radio.
•
K is Invalid
– The infrastructure is unable to authenticate your radio. Please call your
service provider to restore the key to your radio.
4.6.5
SCK (Air Interface Encryption Class 2)
Static Cipher Key (SCK) is a secret key used for the Air Interface Encryption Class 2. It may be used to
encrypt calls and data in TMO and DMO.
The SCK air interface encryption provides service confidentiality between radios and infrastructure
when in TMO, and between radios when in DMO. A radio is capable of being loaded with up to 32
SCKs. Specific keys are used for encrypting the air interface.
Any mismatch between radios and/or infrastructure impacts communication – only those using the
same key as the transmitting party are able to decode and hear the communication.
4.6.5.1
TMO SCK
Your service provider can enable SCKs in TMO. The SCKs used in TMO are called TMSCKs.
4.6.5.2
DMO SCK
Your service provider can enable SCKs in DMO. The SCKs used in DMO are called DMSCKs.
4.6.5.2.1
Verifying DMSCK Validity
When and where to use:
To ensure that the DMSCKs in the radio are valid and can be used for the air
interface encryption.
Procedure:
1
From the home screen, press the
Menu
key.
2
Select
Security
→
DMSCK Validity
.
The radio displays:
•
DMSCK is Valid
– The radio can work encrypted in DMO.
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