Stefan and his colleagues Christian Paquin and Greg Thompson have joined the Identity and Access Group at Microsoft

The news just become official that Microsoft has acquired Stefan Brand’s Credentica and all its intellectual property. This pairs up Stefan with Microsoft’s Identity and Access team to bring Credentica’s groundbreaking U-Prove zero-knowledge-proof technology to market. This is a very exciting development, particularly because it means that between Microsoft’s work on CardSpace and Higgins work on [...]

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