Abstract
An Opportunistic Network (Oppnet) is an enhanced evolution of Mobile ad hoc network, where at any given time a route between source and destination does not exist, yet messages are routed opportunistically via intermediate contacts. We implemented two types of Oppnet deployments, an Open Oppnet and a Selective Oppnet, and analyzed both deployments by studying three Complex Network Properties, namely Average Shortest Distance, Degree Distribution, and Clustering Coefficients. In order to study the robustness of an Oppnet against network attacks, we examined Wormhole attack. According to the simulation results, severity of a Wormhole depends on the nodes location, trajectory and its neighboring nodes. When a worm tunnel was established between a popular node and an aloof node, it caused a noticeable impact on Average Shortest Distance. While in other cases Oppnet remained robust. We also observed that security in a Selective Oppnet is comparatively better than an Open Oppnet.
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