Zero Knowledge Trust? (was Re: Very funny, Polyanna :-( [namespace pollution])

[Eric Hughes]

>However, all of these require some out-of-band communication to make
>sure you have the real key.  Unfortunately, *every* Privacy Enhanced
>Mail system has this *feature* (or mis-feature, or bug, or however you
>feel like looking at it).

I feel like looking at it as a necessity.  Every system for
dissemination of public keys requires at least two paths of
communication.  If there is only one, an interposer can sever the
connection graph of key assurances and create two different key
worlds.

Eric