Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Gaussian Many-to-One Interference Channel with Confidential Messages   We investigate the $K$-user many-to-one interference channel with
confidential messages in which the $K$th user experiences interference from all
other $K-1$ users, and is at the same time treated as an eavesdropper to all
the messages of these users. We derive achievable rates and an upper bound on
the sum rate for this channel and show that the gap between the achievable sum
rate and its upper bound is $\log_2(K-1)$ bits per channel use under very
strong interference, when the interfering users have equal power constraints
and interfering link channel gains. The main contributions of this work are:
(i) nested lattice codes are shown to provide secrecy when interference is
present, (ii) a secrecy sum rate upper bound is found for strong interference
regime and (iii) it is proved that under very strong interference and a
symmetric setting, the gap between the achievable sum rate and the upper bound
is constant with respect to transmission powers.

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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: math-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: econ
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: mtrl-th