Last week, Amazon opened its Sidewalk protocol to third-party developers. Sidewalk is a large mesh network that draws on people’s home internet connections across the US. It’s a service that requires a lot of trust, and so far, most of the devices on it happen to be Amazon’s own products. But that’s about to change — and as a result, Sidewalk’s privacy safeguards are about to be tested at a much larger scale.
No connected device is ever truly ...