This is such a smart move of Microsoft! I am impressed and I am sure that Credentica's technology will lead to a privacy improved version of CardSpace. I hope that Microsoft will provide open access to this technology for others to implement identity selectors, relying parties and security token servers. CardSpace is token agnostic but when I have read the U-Prove papers correctly then there is more then one roundtrip between id selector and STS required to deliver all the nice features. The protocol
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