This is all essentially an implementation of "Open ID". http://openid.net/ http://openid.net/ I was using Open ID through a particular website to log into abou

This is all essentially an implementation of "Open ID". http://openid.net/ http://openid.net/ I was using Open ID through a particular website to log into about 10 different sites. That Open ID provider decided to shut down since so many social networks were offering the same service. Now I mostly use Google and Facebook (depending on what each site allows). If either of their log in services become compromised, we have bigger problems.