What's the difference between OpenID and OAuth?

Technology Community › Category: ASP.NET Web API › What’s the difference between OpenID and OAuth?

VietMX Staff asked 5 years ago

OpenID is (mainly) for identification/authentication, so that stackoverflow.com knows that I own chris.boyle.name (or wherever) and therefore that I am probably the same person who owned chris.boyle.name yesterday and earned some reputation points.
OAuth is designed for authorization to take actions on your behalf, so that stackoverflow.com (or wherever) can ask permission to, say, Tweet on your behalf automatically, without knowing your Twitter password.