We consider a scenario where a sophisticated jammer jams an area in a single
wireless sensor network. The jammer controls the probability of jamming and transmission
range to cause maximal damage to the network in terms of corrupted communication l
The jammer action ceases when it is detected by a monitoring node in the network, and a
notification message is transferred out of the jamming region.
The jammer is detected at a monitor node by employing an optimal detection test based on
ntage of incurred collisions. On the other hand, the network computes channel
access probability in an effort to minimize the jamming detection plus notification time. In
order for the jammer to optimize its benefit, it needs to know the network channel ac
probability and number of neighbors of the monitor node.
Accordingly, the network needs to know the jamming probability of the jammer. We study
the idealized case of perfect knowledge by both the jammer and the network about the
strategy of one anoth
er, and the case where the jammer or the network lacks this knowledge.
The latter is captured by formulating and solving optimization problems, the solutions of
which constitute best responses of the attacker or the network to the worst
case strategy of
ch other. We also take into account potential energy constraints of the jammer and the
network. We extend the problem to the case of multiple observers and adaptable jamming
transmission range and propose a intuitive heuristic jamming strategy for that cas
channel wireless networks utilize several orthogonal frequency bands to eliminate
interference between parallel transmissions and hence, improve the network capacity. Due to
their increased performance compared to single
networks, they are being integrated
into various network architectures, such as mobile ad hoc, vehicular, sensor, wireless local
area, mesh, and cognitive radio networks. The increased capacity of multi
can be translated into actual throu
ghput only if critical network functions such as channel
allocation and routing are efficiently coordinated.
These functions are collaboratively coordinated by exchanging messages on a broadcast
channel known as the control channel. From a security point
of view, convergence on a pre
assigned control channel constitutes a single point of failure. An adversary can severely
degrade the network performance by launching a Denial of Service (DoS) attack on the
control channel, thus negating any gain due to the
availability of multiple data channels. A
sophisticated adversary can intelligently utilize jamming to attack higher
and deny network availability at a very small energy cost.
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