Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Threshold Quantum Cryptography   Most current research on quantum cryptography requires transmission and
reception of single photons that creates severe implementation challenges and
limits range. This paper argues for the development of threshold quantum
cryptography protocols in which the system is secure so long as the number of
photons being exchanged between Alice and Bob is below a specified threshold.
We speak of a (p-k-n) threshold system where if the number of photons exchanged
is less than p, the system is completely secure, when it is between p and k,
the system is partially secure, and when it exceeds k, the system is insecure.
The BB84 protocol is (1-1-1) whereas the three-stage protocol appears to be
(p-4p-n), where p is the least number of photons necessary to determine the
polarization state of identically prepared photons. New quantum cryptography
systems should be sought that provide greater flexibility in the choice of p
and k.

10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol