Tied to a super-clever smartphone and leveraging secure network connections and mobile Net, it turns out that NFC phones make a very good key.
Throughout their long history keys have had two very specific properties that are intertwined. First they physically exist to undo locks–thereby giving access to what’s contained behind the lock. And they also confer/imply authority on the keyholder as being privileged to have access … which is why we keep keys secret, safe. This second aspect of identifying the keyholder is actually as important as the first, although it’s always been a problem for physical keys–because the key itself can be stolen, and thus used by someone who doesn’t have. . . [read]