An encrypted form of the key used in encrypting the
packets passed between the TACACS+ server and the client.
This key must match the one configured on the server.
This object may only be read or written when
hpSwitchAuthenticationEncryptCredentialsMethod is set to a
value other than none(0). At most one of
hpSwitchTacacsServerKey and hpSwitchTacacsServerKeyEncrypted
may be set in any transaction. This object should only be
written with an encrypted key previously read from a
compatible HP Networking device.