UWB transmissions offer a potentially robust physical
layer security for WSNs as a consequence of their
large bandwidth. Indeed, WSNs that rely on UWB radio
signals are somewhat inherently more secure, because
the low output power and short pulses of these signals
make their transmissions to appear as white noise
from a distance. Nevertheless, UWB signals could potentially
be sniffed by a determined attacker who is located
close to the transmitter, enabling the latter to launch an
attack against the WSN [7,8]. Therefore, even this class
of WSNs requires that security mechanisms are implemented
at every layer of the sensor network protocol
stack.
UWB transmissions offer a potentially robust physicallayer security for WSNs as a consequence of theirlarge bandwidth. Indeed, WSNs that rely on UWB radiosignals are somewhat inherently more secure, becausethe low output power and short pulses of these signalsmake their transmissions to appear as white noisefrom a distance. Nevertheless, UWB signals could potentiallybe sniffed by a determined attacker who is locatedclose to the transmitter, enabling the latter to launch anattack against the WSN [7,8]. Therefore, even this classof WSNs requires that security mechanisms are implementedat every layer of the sensor network protocolstack.
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