Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Classification of Attacks in Wireless Sensor Networks   In wireless sensor networks (WSNs), security has a vital importance.
Recently, there was a huge interest to propose security solutions in WSNs
because of their applications in both civilian and military domains.
Adversaries can launch different types of attacks, and cryptography is used to
countering these attacks. This paper presents challenges of security and a
classification of the different possible attacks in WSNs. The problems of
security in each layer of the network's OSI model are discussed.

20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
3
The categories of this paper are: physics
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an