If you combine the lookup with a registration and proof-of-possession algorithm (for the private key), then this might collectively be a solution…the devils always in the details however :)
Randy On Feb 8, 2013, at 11:43 AM, Dave Cridland <d...@cridland.net> wrote: > Just a thought, but if the lookup gave you back a certificate, you'd get a > public key and a set of attributes all certified by an authority. > > Then the choice of whether to trust the data becomes a matter of delegated > trust, which we basically understand. >