What do Sayada, Tunisia, and Red Hook, Brooklyn, have in common? At first glance, not much. One is a fishing town on the Mediterranean Sea. The other is a waterfront neighborhood in an industrial section of America’s largest city. But both are using a networking technology that is cheap, relatively easy to set up, and remarkably resilient and secure.
Called a mesh network, the technology lets users connect directly to each other rather than through a central hub. For the citizens of Sayada, that means they can create a community network free from government surveillance or interference. For residents of Red Hook, the local mesh network helps them stay connected during power outages.