InformationCard Token Provider Registry Key
The HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\InformationCard Token Provider key stores the CLSID of the identity selector that the MIME handler calls. Internet Explorer 7.0 supports information cards by using a MIME handler extension called Microsoft Information Card IE Helper, available from icardie.dll. The handler calls an identity selector that is specified by the InformationCard Token Provider key. For Internet Explorer 7.0, the identity selector uses CardSpace.