Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improved Finite-Key Security Analysis of Quantum Key Distribution
  Against Trojan-Horse Attacks   Most security proofs of quantum key distribution (QKD) disregard the effect
of information leakage from the users' devices, and, thus, do not protect
against Trojan-horse attacks (THAs). In a THA, the eavesdropper injects strong
light into the QKD apparatuses, and then analyzes the back-reflected light to
learn information about their internal setting choices. Only a few recent works
consider this security threat, but predict a rather poor performance of QKD
unless the devices are strongly isolated from the channel. Here, we derive
finite-key security bounds for decoy-state-based QKD schemes in the presence of
THAs, which significantly outperform previous analyses. Our results constitute
an important step forward to closing the existing gap between theory and
practice in QKD.

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The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
18
The categories of this paper are: econ