Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Converse Results for Secure Index Coding   In this work, we study the secure index coding problem where there are
security constraints on both legitimate receivers and eavesdroppers. We develop
two performance bounds (i.e., converse results) on the symmetric secure
capacity. The first one is an extended version of the basic acyclic chain bound
(Liu and Sadeghi, 2019) that takes security constraints into account. The
second converse result is a novel information-theoretic lower bound on the
symmetric secure capacity, which is interesting as all the existing converse
results in the literature for secure index coding give upper bounds on the
capacity.

4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin