It used to be that on the Internet, nobody knew you were a dog … or a trading partner, or a rogue. In this era of Big Data, geolocation, and light bulbs that call home, it may seem that those days are behind us.
But it’s one thing to know who somebody is in order to send them a personally targeted advertisement. It’s another to know with enough certainty to engage in large-value transactions, or to confer on them some public benefit, like a welfare payment or a student loan.
Therefore the management of identity online remains an . . . [more]