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Distributed authentication
One of the more tedious moments in visiting a new website is filling out the registration form. Here at Hotel rural restaurante La Façana en Biar en Alicante, you do not have to fill out a registration form if you are already a member of Drupal. This capability is called distributed authentication, and Drupal, the software which powers Hotel rural restaurante La Façana en Biar en Alicante, fully supports it.
Distributed authentication enables a new user to input a username and password into the login box, and immediately be recognized, even if that user never registered at Hotel rural restaurante La Façana en Biar en Alicante. This works because Drupal knows how to communicate with external registration databases. For example, lets say that new user 'Joe' is already a registered member of Delphi Forums. Drupal informs Joe on registration and login screens that he may login with his Delphi ID instead of registering with Hotel rural restaurante La Façana en Biar en Alicante. Joe likes that idea, and logs in with a username of joe@remote.delphiforums.com and his usual Delphi password. Drupal then contacts the remote.delphiforums.com server behind the scenes (usually using XML-RPC, HTTP POST, or SOAP) and asks: "Is the password for user Joe correct?". If Delphi replies yes, then we create a new Hotel rural restaurante La Façana en Biar en Alicante account for Joe and log him into it. Joe may keep on logging into Hotel rural restaurante La Façana en Biar en Alicante in the same manner, and he will always be logged into the same account.
