Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Securing Wireless Communications of the Internet of Things from the
  Physical Layer, An Overview   The security of the Internet of Things (IoT) is receiving considerable
interest as the low power constraints and complexity features of many IoT
devices are limiting the use of conventional cryptographic techniques. This
article provides an overview of recent research efforts on alternative
approaches for securing IoT wireless communications at the physical layer,
specifically the key topics of key generation and physical layer encryption.
These schemes can be implemented and are lightweight, and thus offer practical
solutions for providing effective IoT wireless security. Future research to
make IoT-based physical layer security more robust and pervasive is also
covered.

33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph