| Tech Sanity Check: has a commemtary about yet another Multi-factor Authentication scheme.
vidoop has this interesting scheme for multi-factor. The interesting twist in this case is that the scheme has the potential to be based more on how you think than a known fact. You might select a sequence of pictures containing boats, airplanes, and cars. The theme could be transportation, the colour blue or aluminium.
They aren't there yet - it seems their current scheme relies on you thinking they way they do. But it does strike me as an improvement over static images.
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