is this authentication or authorization?

Question

I want to use DotNetOpenAuth to create something like this

Is is authentication or authorization? Any recommended tutorials?

Answer 1

• Authentication - You are who you say you are. Like showing your ID card would mean that you are indeed who you say you are.
• Authorization - You can access these resources. Knowing who you are, this would be giving (or denying) you access to a building.

In your screenshot you are giving authorization now that you have been authenticated.

Answer 2

In easy terms: Authentication is the process of determining the identity of the user. Authorization is the process of determining what a user is allowed to do.

Typically the result of authorization is based on the result of authentication: you may do X if you are Y. When I log in to StackExchange, the system sees I'm Andre (authentication), so regarding to the rules I'm allowed to create gallery chat rooms (authorization).