Data Security in MANETs using Multipath Routing and Directional Transmission

A cross-layer approach is investigated to improve data security in Mobile Ad Hoc Networks (MANETs). The use of directional antennas and intelligent multipath routing is proposed to enhance end-to-end data confidentiality and data availability with respect to outsider attacks. The goal is to impede rogue attempts to gain unauthorized access to classified information or disrupt the information flow. The interplay between the physical, link, and network layers is considered. A novel simulator is developed to accurately quantify the data confidentiality benefits of these approaches. This study leverages the existence of multiple paths between end-nodes to statistically improve data confidentiality and data availability in hostile MANET environments, where both insider and outsider adversaries may be present. Simulation results show that the proposed mechanisms can greatly improve data confidentiality as compared to existing schemes. These mechanisms can also improve data availability.