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This paper describes a computer network moving target defense (MTD) system that incorporates the benefits of both literal modifications of various network aspects along with semantic changes made to several fundamental aspects of the network. The result is a cryptographically strong MTD system that is transparent to legitimate users while appearing random and chaotic to potential attackers.

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In traditional MANET MAC and routing protocols, if any link in a route fails, multiple fruitless attempts are made to use the failed link before reporting failure to the routing layer or attempting local recovery. The high frequency of link errors between mobile nodes requires rapid recovery in order to provide acceptable performance, especially for real-time applications. In this paper, we propose CIFLER, a cross-layer approach which uses enhanced channel reservation messages to allow alternate nodes to immediately elect themselves using only inferred neighbor information. This self-election avoids reliance on individual links and minimizes the impact frequent link errors have on delay, energy usage, and the function of upper layer protocols. We show via simulation that CIFLER provides better results in typical MANET scenarios. Unlike other local recovery schemes, CIFLER does not suffer from duplicated messages, allows new nodes to almost immediately learn the information needed to assist in the recovery of existing routes, and does not require additional hardware, delays, or control messages.

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