Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Image Steganography Scheme using Randomized Algorithm and
  Context-Free Grammar   Currently, cryptography is in wide use as it is being exploited in various
domains from data confidentiality to data integrity and message authentication.
Basically, cryptography shuffles data so that they become unreadable by
unauthorized parties. However, clearly visible encrypted messages, no matter
how unbreakable, will arouse suspicions. A better approach would be to hide the
very existence of the message using steganography. Fundamentally, steganography
conceals secret data into innocent-looking mediums called carriers which can
then travel from the sender to the receiver safe and unnoticed. This paper
proposes a novel steganography scheme for hiding digital data into uncompressed
image files using a randomized algorithm and a context-free grammar. Besides,
the proposed scheme uses two mediums to deliver the secret data: a carrier
image into which the secret data are hidden into random pixels, and a
well-structured English text that encodes the location of the random carrier
pixels. The English text is generated at runtime using a context-free grammar
coupled with a lexicon of English words. The proposed scheme is stealthy, and
hard to be noticed, detected, and recovered. Experiments conducted showed how
the covering and the uncovering processes of the proposed scheme work. As
future work, a semantic analyzer is to be developed so as to make the English
text medium semantically correct, and consequently safer to be transmitted
without drawing any attention.

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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org