There's an architecture for doing orignation validation in BGP, lot's of info if you want to listen to http://packetpushers.net/show-105-bgp-origin-validation-w

There's an architecture for doing orignation validation in BGP, lot's of info if you want to listen to http://packetpushers.net/show-105-bgp-origin-validation-with-resource-public-key-infrastructure-rpki/ http://packetpushers.net/show-105-bgp-origin-validation-with... However, it pretty much requires everyone to do it.