One problem is that BGP has not changed in a long time. The last version of the protocol (v4 I think?) predates 9/11, as do all of the books on how to use BGP.

One problem is that BGP has not changed in a long time. The last version of the protocol (v4 I think?) predates 9/11, as do all of the books on how to use BGP. Most routing people (many/most of whom are on the older side) look at BGP as a "done deal", rather than a protocol that requires constant changes and software updates. The latest change to BGP has been to allow for larger ASNs by increasing the byte size, and even that was quite the project. Selling Cisco on it is the best path to adoption - they have a massive market share. Even most of those old books on BGP are just glorified Cisco router manuals. Really though, I would be all for BGPsec for my routers, but it feels like lipstick on a pig. We're in the crypto phase of the net, and we now have ways to make distributed routing systems that require no centralized IP registrars. I hope this blows your mind as much as it blew mine: https://github.com/cjdelisle/cjdns https://github.com/cjdelisle/cjdns