Security in Mobile Ad hoc Networks: Detection and Isolation of Selfish Nodes
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Date
2007-04
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Université des Sciences et de laTechnologie Houari-Boumediene (USTHB)
Abstract
Ad hoc networking is a research field that attracts more and more attention amongst
researchers. It includes a variety of topics involving many challenges. In this thesis,
we deal with security problems, and focus on one related to the energy constraint
of the nodes forming the ad hoc network, namely node selfish misbehavior or node
non-cooperation. This problem threatens the service availability, one of the security
requirement. It consists of a misbehavior in which the node, anxious about its battery
shortage, drops packets originated from other nodes it is assumed to route, while using
them as routers to transmit its own packets toward remote nodes. We first provide a
general review of some security problems, along with the current solutions, then we
survey the selfish misbehavior in a separate chapter. Before attempting to mitigate
the selfishness problem we first treat its cause, by tackling the power management,
and proposing a power aware-routing protocol. However, although the power-aware
routing protocols, such as the one we propose, help improving the battery life time,
they are far from eliminating this challenging problem. Therefore, a solution that
detects and isolates selfish nodes is mandatory for self-organized ad hoc networks.
We then propose a new solution to monitor, detect, and isolate such nodes.
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Keywords
mobile ad hoc networks, security, Selfish misbehaviour