Private address and transactions can be accomplished by connecting Arizen with a Secure/Super node using RPC.
Arizen is a lightweight wallet which means that it is actually a GUI that uses an API to send transactions. For private transactions, Arizen uses the zend (daemon) which runs on a trusted server, your Secure/Super Node.
From the "Settings" screen, your Secure/Super node details shall be entered, in order to be able to send ZEN to/from private Z addresses.
