CardSpace is the name for a new technology in .NET Framework 3.0 that simplifies and improves the safety of accessing resources and sharing personal information on the Internet. It helps developers build Web sites and software that are less susceptible to the most commonly deployed identity-related attacks such as phishing. Windows CardSpace helps alleviate the problems of traditional online security mechanisms by reducing reliance on user names and passwords and instead using a separate desktop and cryptographically strong claims-based authentication. More at
http://www.microsoft.com/net/cardspace.aspx
Windows CardSpace can be found in the Control Panel. It is a new technology so doesn't integrate with many website yet. But expect to see many internet sites supporting CardSpace in the coming years.
Windows CardSpace.
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