OpenID and Crowd SSO: TheServerSide Tech Brief

OpenID is a decentralized single sign-on system that allows web users to authenticate once, then share credentials among all participating servers or websites via a unique URL. This saves users from remembering authentication tokens like user ID or password. Once a user registers and authenticates against a given site, or identity provider, partnering websites can use OpenID to confirm the user's digital identity without additional logons. Justen Stepka is the tech lead for Atlassian Crowd. He talks about the basics of OpenID.