Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: RSSI-based Secure Localization in the Presence of Malicious Nodes in
  Sensor Networks   The ability of a sensor node to determine its location in a sensor network is
important in many applications. The infrastructure for the location-based
services is an easy target for malicious attacks. We address scenarios where
malicious node(s) attempt to disrupt, in an uncoordinated or coordinated
manner, the localization process of a target node. We propose four techniques
for secure localization: weighted least square (WLS), secure weighted least
square (SWLS), and $\ell_1$-norm based techniques LN-1 and LN-1E, in a network
that includes one or more compromised anchor nodes. WLS and SWLS techniques are
shown to offer significant advantage over existing techniques by assigning
larger weights to the anchor nodes that are closer to the target node, and by
detecting the malicious nodes and eliminating their measurements from the
localization process. In a coordinated attack, the localization problem can be
posed as a plane fitting problem where the measurements from non-malicious and
malicious anchor nodes lie on two different planes. LN-1E technique estimates
these two planes and prevents disruption of the localization process. The
Cramer-Rao lower bound (CRLB) for the position estimate is also derived. The
proposed techniques are shown to provide better localization accuracy than the
existing algorithms.

21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg