War-driving has its limitations. These include the amount of time it takes to perform wardialing and the suspicions that arise when a car is detected circling a block hundreds of times with an auspicious antenna up top and a laptop in view.
Warshipping uses disposable, low-cost and low-power 3G-enabled single-board computers that are easy to build for under 100 euro, the proliferation of e-commerce deliveries and a command-and-control (C&C) server to remotely perform close-proximity attacks, regardless of the location of an adversary. It increases target accuracy dramatically. Hide a tiny device in a package and ship it off to the target to gain access to their network. Low build-cost means several can be shipped. The device can be tucked into the bottom of a packaging box or stuffed in a toy.
While in transit, the device can do periodic basic wireless scans, similar to what a laptop does in war-driving when looking for Wi-Fi hotspots, and send its location coordinates via GPS back to the C&C server. Once having arrived it can be used for further attacks to gain a persistent foothold in the network.