A new type of battlefield network is in development

MOBILE armies need mobile communications. Those communications, though, must be secure--and not just from eavesdropping. They also need to be uninterruptible. And that is a problem. Many mobile networks (think Wi-Fi routers or mobile-phone towers) operate via hubs. Destroy the hub and you destroy the network. Even a peer-to-peer system in which messages travel in a series of hops between nodes (in the form of the devices that comprise the system) rather than via a hub, can be degraded by a loss ...