If configured by your service provider, the radio plays a sound and displays Call & Data Not
Encrypted when encryption is on and you receive a clear call (unencrypted). This feature provides
service confidentiality between you and the system.
In the TMO Mode, when Air Encryption is enabled on your radio but cannot be supported due to an
infrastructure failure, the following icon appears on the display:
. When encryption is not available in
the DMO Mode, the radio displays:
.
This menu item allows you only to view air encryption state.
4.5.3.1
Viewing Air Encryption State
Procedure:
1 From the home screen, press the Menu key.
2 Select Security → AirEncrypt.
Your radio displays:
• Air Encryption Is Off – The Air Encryption is not activated.
• Air Encryption Is On – The Air Encryption is activated.
4.5.4
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.
4.5.4.1
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.
4.5.5
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.
MN003460A01-AE
Chapter 4: Main Menu
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