On the other hand, structured identity spaces often induce the imposition of various forms of monopoly rentals when providing access to elements drawn from the space.
We've probably learned from the DNS (and others) that the expression of preferences in terms of desired characteristics of any identity space has a whole bunch of considerations, only some of which are technical :-(
People who were in HIP will know that Steve Kent wasn't in favor of HIP. Steve cornered me in the hallway to point out that randomly generated identities aren't very useful for things like access control configuration and so you will neeed to do a lot of mapping back and forth, which is of course very inconvenient. You want to express policy using either DNS names or IP addresses.
Thought I'd forward it along... -Ekr
-- [Eric Rescorla ekr@rtfm.com] http://www.rtfm.com/