OpenID and OAuth think that they have a collective right answer, but Facebook clearly thinks that it has its own. As Louis Gray told me in a discussion about the subject, it will likely come down ...

OAuth 2.0 and OpenID Connect: The Professional Guide Authentication and authorization are critical parts of any application. They evolved over the years to meet the challenging requirements of the ...

OpenID provides one login for a variety of sites, and is used to authenticate that you are who you say you are. OAuth authorizes access so that, say, one website can get your information elsewhere.

OpenID is a solution for Web-based single sign-on whereas OAuth is for making secure resources in a Web application accessible to third-party software, including desktop applications.