The term 'OpenID' has two meanings:

OpenID is an open, free protocol which allows you to use a single identifier to login to any OpenID-enabled website. OpenID allows the website to communicate with your OpenID provider (e.g. your organisation's CrowdID server) when attempting to verify your login.

Do you have a zillion usernames and passwords, which you use for logging in to blogs and websites all over the place? OpenID allows you to throw them all away, for all websites that support it. More and more sites are coming on board.


CrowdID User Guide