c0lo [soylentnews.org] writes:
The
shutdown timetable [google.com] for Google's OpenID: completely gone by April 20, 2015, with some intermediary steps
Google+ sign-in implements OAuth2.0. The - maybe subtle -
difference between OpenID and OAuth [wikipedia.org]:
OpenID and OAuth are both authentication methods, but while OpenID is a way to use a single set of user credentials to access multiple sites, OAuth is more a way to allow one site to access and use information related to the user's account on another site.
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