Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Continuous-variable Quantum Key Distribution protocols with eight-state
  discrete modulation   We propose a continuous variable quantum key distribution protocol based on
discrete modulation of eight-state coherent states. We present a rigorous
security proof against the collective attacks considering both of realistic
lossy, noisy quantum channels, imperfect detector efficiency, and detector
electronic noise. This protocol shows high tolerance against excess noise and
it is promising to achieve hundreds distance long in optical fiber base.

29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics