I'd call it X.509 Certificate Authorities. Unfortunately, the root of that is busted, so we should build on something else.
The same thing could be done with GPG, via identity validation (jumping through whichever hoops are required to link people's claimed 'real' world identities with their keys; probably checking documentation and then signing a key). However, that's probably best achieved via some decentralized method rather than trusting a centralized corporate intermediary as per X.509 CA's.
