Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A New Approach to SMS Steganography using Mathematical Equations   In the era of Information Technology, cyber-crime has always been a worrying
issue for online users. Phishing, social engineering, and third party attacks
have made people reluctant to share their personal information, even with
trusted entities. Messages that are sent via Short Message Service (SMS) are
easily copied and hacked by using special software. To enforce the security of
sending messages through mobile phones, one solution is SMS steganography. SMS
Steganography is a technique that hides a secret message in the SMS. We propose
a new approach for SMS steganography that uses a mathematical equation as the
stego media in order to transmit the data. With this approach, we can hide up
to 35 characters (25%) of a secret message on a single SMS with maximum of 140
characters.

15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
2
The categories of this paper are: math