(Up to: Ideas User Controlled Wiki Formatting )

Much of the concern over centralised single sign-on servcies, such as MS Passport, is about where the data is stored and who has control over it. Thus, doesn't it make sense to invert the system, give control over a user's data to the user, and force the target service to authenticate with the user, rather than the other way around?

Diagram to come, Useful links:

• sxip
• Identity Commons
• Doc Searl's article on both the above
• SharedID