We investigate a new threat: networks of stealthy routers (S-Routers), communicating across a restricted area. The ‘classical’ approach of transmission-detection by triangulation fails, since S-Routers use short-range, low-energy communication, detectable only by nearby devices. We investigate algorithms to intercept S-Routers, using one or more mobile devices, called Interceptors. Given a source of communication, Interceptors find the destination, by intercepting packet-relaying by S-Routers along the path. We evaluate the algorithms analytically and experimentally (simulations), including against a parametric, optimized S-Routers algorithm. Our main result is a (centralized) Interceptors algorithm bounding the outcome to O(Nlog^2(N), where N is the number of S-Routers. We later improve the bound to O(Nlog(N)log(log(N))), for the case where the transmission schedule of the S-Routers is continuous.
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[v1] 2017-12-20 04:40:22
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