The key to be used when communicating with this
server.
A key with a value of zero indicates an invalid
ntpServerPublicKey. When the authentication
feature is enabled the system will not sync with
this server when ntpAuthenticationPublicKey
doesn't match with NTP Packet's public key.
or
If the ntpAuthenticationTrustedMode is trusted but
encrypted message of ntpAuthenticationSecretKey
with NTP packet's data doesn't match with NTP
packet's crypto checksum in the message
authentication mode (MAC).
or
If the ntpAuthenticationTrustedMode is untrusted.
In client mode NMP will not send request NTP
Packet to the server when ntpServerPublicKey
doesn't match with any of the
ntpAuthenticationPublicKey in
ntpAuthenticationTable.
or
If the ntpAuthenticationTrustedMode is untrusted.