Some typical assumptions made in existing literatures are listed below.
3.1 Typical Assumptions
Since sensor nodes use wireless communications, radio links are generally insecure.
Eavesdropping, injection, replay, and other attacks can be placed on
the network. The adversary is able to deploy malicious nodes in the network,
or compromises some legitimate nodes. Most existing papers in the literature
on sensor network security do not assume that sensor nodes are tamper resistant
since the corresponding investment adds significant per-unit cost to
sensor nodes.
A typical assumption is to assume that base stations are well protected and
trusted. Since a base station is the gateway for sensor nodes to communicate
with the outside world, compromising the base station could render the entire
sensor network useless. Thus, base stations in sensor networks are assumed to
be secure.
Other typical assumptions on sensor networks are listed as follows: (1) sensor
nodes are densely and statically deployed in the network; (2) sensor nodes
are aware of their own locations. Location awareness is a basic requirement
for sensor nodes in many sensor networks, since most sensing data must be
associated with the locations where data is generated. The network can use
location services such as [22] and [23] to estimate the locations of individual
nodes, and no GPS receiver is required at each sensor.
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Xiaojiang Du and Yang Xiao
There are other particular assumptions made in some work, which may
limit the applicability of the proposed schemes.
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