Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Modified Wigner's Inequality for Secure Quantum Key Distribution   In this report we discuss the insecurity with present implementations of the
Ekert protocol for quantum-key distribution based on the Wigner Inequality. We
propose a modified version of this inequality which guarantees safe quantum-key
distribution.

35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics