unbound-control: general question

[A. Schulze]

Hello,

as far as I understand the unbound.conf(5) the communication between  
unbound-control and unbound itself
always require the setup of an TLS connection. Is this also true when  
we setup control-interface as a unix socket.

But we could set
   control-use-cert: no
   control-interface: /path/to/socket

My question: how much less secure is such setup?

Thanky for ideas...
Andreas