What are private group names and what are they good for?
Private group names uniquely identify each connection to a Spread daemon and act as that connection’s name. Any other Spread application can send a unicast message to the application listening on that connection by sending a standard SP_multicast() message to the private group name. This provides a ready-made point-to-point message service as well as a multicast service to groups. Spread inforces that no-one else can ever join a connection’s private group.
