A useful, yet sparsely documented feature of Windows CardSpace is its support for resource side Security Token Services (STSs) – STSs that are used by relying parties rather than Identity Providers. Vittorio has done an excellent job helping to...

The version of Windows CardSpace that shipped in .NET Framework 3.0 will not run when installed on a FAT file system. We’ve received a surprising amount of feedback (some of the earliest from Pamela Dingle ) that customers are still using FAT file...

Here’s another change we made in .NET Framework 3.5 to improve our user experience. Users often got confused on what to do after installing a managed card or restoring their backed up cards when initiated outside of CardSpace. This would usually be...