What authentication methods does the web application scanner support?

The web application scan engine supports mutiple authentication scan methods. These methods allows scanning the inside of an application, behind a login.  

Authentication using Web Recorder plugin:

How do I record a login sequence using the Web Recorder plugin?

Authentication using Basic Auth:

How do I run an authenticated web application scan using HTTP Basic?

Authentication using HTML Form:

How do I run an authenticated web application scan using HTML Form?

Authentication using HTML Dynamic Form:

How do I run an authenticated web application scan using HTML Dynamic form?

Authentication using Header Injection:

How do I use header injections in a web application scan?