Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constrained Secrecy Capacity of Finite-Input Intersymbol Interference
  Wiretap Channels   We consider reliable and secure communication over intersymbol interference
wiretap channels (ISI-WTCs). In particular, we first examine the setup where
the source at the input of an ISI-WTC is unconstrained and then, based on a
general achievability result for arbitrary wiretap channels, we derive an
achievable secure information rate for this ISI-WTC. Afterwards, we examine the
setup where the source at the input of an ISI-WTC is constrained to be a
finite-state machine source (FSMS) of a certain order and structure. Optimizing
the parameters of this FSMS toward maximizing the secure information rate is a
computationally intractable problem in general, and so, toward finding a local
maximum, we propose an iterative algorithm that at every iteration replaces the
secure information rate function by a suitable surrogate function whose maximum
can be found efficiently. Although the secure information rates achieved in the
unconstrained setup are expected to be larger than the secure information rates
achieved in the constrained setup, the latter setup has the advantage of
leading to efficient algorithms for estimating achievable secure rates and also
has the benefit of being the basis of efficient encoding and decoding schemes.

9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg