Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Encrypted and Covert DNS Queries for Botnets: Challenges and
  Countermeasures   There is a continuous increase in the sophistication that modern malware
exercise in order to bypass the deployed security mechanisms. A typical
approach to evade the identification and potential takedown of a botnet command
and control server is domain fluxing through the use of Domain Generation
Algorithms (DGAs). These algorithms produce a vast amount of domain names that
the infected device tries to communicate with to find the C&C server, yet only
a small fragment of them is actually registered. This allows the botmaster to
pivot the control and make the work of seizing the botnet control rather
difficult.
  Current state of the art and practice considers that the DNS queries
performed by a compromised device are transparent to the network administrator
and therefore can be monitored, analysed, and blocked. In this work, we
showcase that the latter is a strong assumption as malware could efficiently
hide its DNS queries using covert and/or encrypted channels bypassing the
detection mechanisms. To this end, we discuss possible mitigation measures
based on traffic analysis to address the new challenges that arise f

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The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
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The categories of this paper are: hep-ex
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
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The categories of this paper are: patt-sol
18
The categories of this paper are: econ
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org