Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hacking single-photon avalanche detector in quantum key distribution via
  pulse illumination   Quantum key distribution (QKD) has been proved to be
information-theoretically secure in theory. Unfortunately, the imperfect
devices in practice compromise its security. Thus, to improve the security
property of practical QKD systems, a commonly used method is to patch the
loopholes in the existing QKD systems. However, in this work, we show an
adversary's capability of exploiting the imperfection of the patch itself to
bypass the patch. Specifically, we experimentally demonstrate that, in the
detector under test, the patch of photocurrent monitor against the detector
blinding attack can be defeated by the pulse illumination attack proposed in
this paper. We also analyze the secret key rate under the pulse illumination
attack, which theoretically confirmed that Eve can conduct the attack to learn
the secret key. This work indicates the importance of inspecting the security
loopholes in a detection unit to further understand their impacts on a QKD
system. The method of pulse illumination attack can be a general testing item
in the security evaluation standard of QKD.

14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an