Wireless networking plays an important role in achieving ubiquitous computing where network devices embedded
in environments provide continuous connectivity and
services, thus improving human’s quality of life.
However, due to the exposed nature of wireless links,
current wireless networks can be easily attacked by
jamming technology. Jamming can cause Denial-ofService (DoS) problem which may result in several other
higher-layer security problems, although these are often
not adequately addressed (Wood et al, 2007).
Jamming in wireless networks is defined as the
disruption of existing wireless communications by
decreasing the signal-to-noise ratio at receiver sides
through the transmission of interfering wireless signals.
Jamming is different from regular network interferences
because it describes the deliberate use of wireless
signals in an attempt to disrupt communications whereas
interference refer to unintentional forms of disruptions.
Unintentional interference may be caused by the wireless
communications among nodes within the same networks
or other devices (e.g. microwave and remote controller).
On the other hand, intentional interference is usually
conducted by an attacker who intends to interrupt or
prevent communications in networks. Jamming can be
done at different levels, from hindering transmission to
distorting packets in legitimate communications.
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