no, it's at encyption above a baseline. assume mitm can't crack maximum level,,but can crack baseline and above. if maximum can't be negotiated because mitm prevents it , and less is settled for... well. may as well have fallen back to clear. Lloyd Wood http://about.me/lloydwood ________________________________________ From: Nico Williams <nico@xxxxxxxxxxxxxxxx> Sent: Friday, 22 August 2014 3:42:15 PM To: Wood L Dr (Electronic Eng) Cc: ietf@xxxxxxxx; saag@xxxxxxxx Subject: Re: [saag] Adept Encryption: Was: DANE should be more prominent (Re: Review of: Opportunistic Security -03 preview for comment) On Fri, Aug 22, 2014 at 12:25 AM, <l.wood@xxxxxxxxxxxx> wrote: > Okay, so with opportunistic security, all a man in the middle has to do is block any communications he can't decrypt, and it automatically downgrades to select something he can break? > > Ah, there's the opportunity. Got it. Eh? The idea is to be downgrade resistant. Nico --