Open ID - OpenID Vs. Pseudo-authentication Using OAuth

OpenID Vs. Pseudo-authentication Using OAuth

The following drawing highlights the differences between using OpenID vs. OAuth for authentication. Note that with OpenID, the process starts with the application asking the user for their identity (typically an openid URI), whereas in the case of OAuth, the application directly requests a limited access OAuth Token (valet key) to access the APIs (enter the house) on user's behalf. If the user can grant that access, the application can retrieve the unique identifier for establishing the profile (identity) using the APIs.