Some kind of peer to peer encrypted data storage system (think bitcoin for data) would go a long way towards solving this. You could give sub keys to sites that want to access some of this data and because it's encrypted, distributed and peer to peer no one owns it and you control your data.
Yes this would be crazy with todays infrastructure but in 10 - 20 years when internet is as previlent as electricity and everyone has many terabytes of space it's definitely viable.
I really hope some smart minds are working on something like this in light of these revelations.
How is this any different than hosting your own federated OpenID service? Hell, I'm basically doing this already with XMPP, Email and a blog, but not OpenID because it's not as prevalent as it could be. This is already a solved problem that doesn't take terabytes of storage space. Though, like any common service or protocol, it could be more secure.
Maybe Mozilla could invent some standardized encryption technology. They are the only ones that are remotely trustworthy enough to do something like that.
Yes this would be crazy with todays infrastructure but in 10 - 20 years when internet is as previlent as electricity and everyone has many terabytes of space it's definitely viable.
I really hope some smart minds are working on something like this in light of these revelations.