IndieAuth Links enable sign in with your domain name.
IndieAuth is a way to use your own domain name to sign in to websites. It's like OpenID, but simpler! It works by linking your website to one or more authentication providers such as Twitter or Google, then entering your domain name in the login form on websites that support IndieAuth.
This plugin add link on your home page to your various social profiles with the attribute rel="me"
After the user enters their domain in the sign-in form and submits, indieauth.com goes and scans their domain looking for rel="me" links from providers it knows about (twitter, github, etc...). It also verifies that the third-party website links back to the user's domain with a rel="me" link as well.
This plugin does not send data to other party. It just add HTML markup in the head of your home page.
All authentications processes are delegated.