Google acquired Nest and then Dropcam, so it isn't much of a surprise that it might want more. If there was any doubt there, this latest patent, filed just months after the two acquisitions, would dispel all that. It might be deceptively called "Security Scoring in a Smart-sensored Home", but the message it sends is clear. Google wants to make homes smarter, and probably gather more information than you're willing to hand over through browsers and phones. And like any other house, it all starts at the door.