Bus authentication on Windows

[Nesuan Taiso]

On Linux, clients *know* that the system bus is actually controlled by 
the system administrator because of appropriate file permissions (unix 
domain sockets) or a privileged TCP port number (<1024).

On Windows, the only supported transport is TCP, however Windows allows 
any user to bind to any TCP port. So how does a client verify that the 
bus it connects to is actually controlled an administrative process and 
not some other hostile user who has 'hijacked' the TCP port and is 
masquerading as the real bus in order to sniff traffic?