On Sep 6, 2013, at 9:24 PM, Melinda Shore <melinda.shore@xxxxxxxxx> wrote: > I'm not sure why > "I know this person as <X>" provides much more reliability > than someone asserting their own identity. Actually it's quite useful. It allows me to differentiate email coming from someone I know as X from email coming from someone claiming to be that person, but who does not possess their key.