Understanding Claims-Based Authentication
Claims-based authentication for SharePoint 2010 is built by using the Windows Identity Foundation (WIF) framework. WIF is a set of .NET Framework classes that are used to implement a claims-based identity. Claim-based authentication was developed to provide better fine-grained security for a role-based security model. Most systems, including SharePoint 2007 and its predecessors, use role (or group)-based security. Complex systems can use claims-based security to assign permissions on other attributes (claims) associated with users, such as city or membership in a distribution list.
Claims-based authentication in SharePoint 2010 provides a flexible and extensible authentication system that supports authentication ...
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