Dave, On 16/08/14 00:18, Dave Crocker wrote: > Opportunistic is about choices in encryption. > > It is not about 'no encryption'. I have only seen you espouse that opinion, which is not what's in Viktor's draft. Presenting your views as if those were generally accepted is somewhat distracting. I myself believe that you are mistaken here and that any opportunistic security approach has to allow for the undesirable but potential fallback to no encryption for some peers (hopefully few) to be viable. Without that there would be too many failure cases that would hinder interop and the OS approach would not be adopted as we have seen over and over that better interop trumps better security when those are in conflict. Yes, that is a (reasonable) speculation. Its is also independent of the term used. S.