Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Wireless System Using Random Residue Sequences   This paper describes the architecture of wireless communication system using
random residue sequences. The basic scheme is that of spread spectrum but
instead of using PN sequences for coding, we use random residue sequences. Such
a system can provide cryptographic security whose strength would depend on the
number of code sequences being used.

18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat