Neither. DPRIV is specifying a new transport that can authenticate directly. SIG would only get in the way Sent from my difference engine > On Dec 6, 2014, at 5:02 PM, Ted Lemon <Ted.Lemon@xxxxxxxxxxx> wrote: > >> On Dec 6, 2014, at 12:45 PM, Phillip Hallam-Baker <phill@xxxxxxxxxxxxxxx> wrote: >> * DPRIV be required to provide a mechanism for mutual authentication as well as confidentiality. > > You mean TSIG? Or SIG(0)? > >