Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Asymptotically Secure Network Code for Active Attacks and its
  Application to Network Quantum Key Distribution   When there exists a malicious attacker in the network, we need to be careful
of eavesdropping and contamination. This problem is crucial for network
communication when the network is realized by a partially trusted relay of
quantum key distribution. We discuss the asymptotic rate in a linear network
with the secrecy and robustness conditions when the above type of attacker
exists. Also, under the same setting, we discuss the asymptotic rate in a
linear network when we impose the secrecy condition alone. Then, we apply these
results to the network composed of a partially trusted relay of quantum key
distribution, which enables us to realize secure long-distance communication
via short-distance quantum key distribution.

12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc