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OpenID: Single Sign On for the Web?: Page 4 of 6

If the user is already authenticated to the OpenID Provider, the OpenID Provider will skip its own authentication request to the user.

The biggest change from the OpenID 1.1 specification to Version 2.0 is the system's ability to accept an XRI (Extensible Resource Identifier). XRI is an OASIS standard that's similar to a URL but better suited for Web services and XML environments.

Friends of OpenID

OpenID isn't the only effort aimed at solving the online identity crisis. Other initiatives, such as Windows CardSpace and the Bandit Project, are competing for mindshare among developers and users.

A major goal of CardSpace is to replace username/password log ins as a way to access Web properties, thus thwarting phishing sites set up to steal such information. CardSpace doesn't do away with multiple online identities. Instead, it makes it easier for users to manage those identities.