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Sivu kertoo kattavasti mutta yksinkertaisesti, mistä OpenID:ssä on kysymys.

An OpenID is a way of identifying yourself no matter which web site you visit. It's like a driver's license for the entire Internet. But, it's even more than that because you can (if you want) associate information with your OpenID like your name and your e-mail address, and then you choose how much web sites get to see about you. This means that web sites that take advantage of OpenID won't bother you for the same information over and over again.

Tämä vaikuttaa aika näppärältä keinolta lähettää viestejä usealle vastaanottajalle Gmail:lla