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Get an architectural and programmatic overview of Claims based Identity implemented in SharePoint 2010 including how identity is dealt with at Sign-in and for service calls both within SharePoint and to external systems. Also see how to build solutions that work on top of SharePoint and that can use the underlying platform to deal with common problems like supporting multiple identity providers, user identity delegation between web front end code and service code and securely accessing external/LOB web services without resorting to username/password storage.
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