Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Partially random phase attack to the practical two-way
  quantum-key-distribution system   Phase randomization is a very important assumption in the Bennett-Brassard
1984 quantum key distribution (QKD) system with a weak coherent source. Thus an
active phase modulator is needed to randomize the phase of source. However, it
is hard to check whether the phase of source is randomized totally or not in
practical QKD systems. In this paper a partially random phase attack is
proposed to exploit this imperfection. Our analysis shows that Eve can break
the security of a two-way QKD system by using our attack, even if an active
phase randomization is adopted by Alice. Furthermore, the numerical simulation
shows that in some parameter regimes, our attack is immune to the
one-decoy-state method.

2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
19
The categories of this paper are: eess