Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Hands-On Quantum Cryptography Workshop For Pre-University Students   We developed a modified version of a conventional (BB84) quantum key
distribution protocol that can be understood and implemented by students at a
pre-university level. We intentionally introduce a subtle but critical
simplification to the original protocol, allowing the experiment to be
assembled at the skill level appropriate for the students, at the cost of
creating a security loophole. The security vulnerability is then exploited by
student hackers, allowing the participants to think deeper about the underlying
physics that makes the protocol secure in its original form.

12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin