Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: K-user Interference Channels: Achievable Secrecy Rate and Degrees of
  Freedom   In this work, we consider achievable secrecy rates for symmetric $K$-user ($K
\ge 3$) interference channels with confidential messages. We find that nested
lattice codes and layered coding are useful in providing secrecy for these
channels. Achievable secrecy rates are derived for very strong interference. In
addition, we derive the secure degrees of freedom for a range of channel
parameters. As a by-product of our approach, we also demonstrate that nested
lattice codes are useful for K-user symmetric interference channels without
secrecy constraints in that they yield higher degrees of freedom than previous
results.

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The categories of this paper are: cond-mat
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int