OpenID is an open, decentralized standard for authenticating users which can be used for access control, allowing users to log on to different services with the same digital identity where these services trust the authentication body.
OpenID replaces the common login process that uses a login-name and a password, by allowing a user to log in once and gain access to the resources of multiple software systems.
The term OpenID can also refer to an ID used in the standard.
An OpenID is in the form of a unique URL, and is authenticated by the user's 'OpenID provider' (that is, the entity hosting their OpenID URL). The OpenID protocol does not rely on a central authority to authenticate a user's identity. Since neither the OpenID protocol nor Web sites requiring identification may mandate a specific type of authentication, non-standard forms of authentication can be used, such as smart cards, biometrics, or ordinary passwords.
OpenID authentication is now used and provided by several large websites. Providers include AOL, BBC, Google,IBM, Microsoft, MySpace, Orange, PayPal, VeriSign, Yandex, Ustream and Yahoo!.
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Raju Jetla
"falling down is not a crime, staying down is a crime"
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