Imagine the authorization server as an on-line wallet: secure, compatible regardless of jurisdiction, and owned. It would share a lot of the attributes and business issues of Bitcoin wallets. For lack of a more inspired name, I will call it a Wallet Authorization Server or WAS.
Like Bitcoin wallets, the WAS will be delivered to individuals as either a VM they can run on hardware / VMs they control or not. Individuals will choose sovereignty vs. convenience.
Do we want to drive future versions of UMA in this direction? If so, what are the minimum essential components of the WAS in order to make it compatible with all UMA resource servers and all clients that are willing to support a truly user-centric model?