Abstract:
Among many types of security techniques,
steganography is the one that used to build private
communication over the public channel. This paper
proposes linguistic steganography system by utilizing
lossless compression methods, error control
techniques and syntax transformation of English
language based embedding. The secret message is
first compressed with Huffman or Shannon-Fano
compression methods to achieve higher capacity. To
maintain integrity and confidentiality of the secret
message, Hamming code error correction and SHA-1
based Keyed-hash Message Authentication Code
(HMAC) may be applied after compression
according to the required security level. Because of
using transformable syntax forms to carry hidden
information, the imperceptibility cannot be damaged
by producing meaning preserving sentences. The
proposed system is evaluated by using Reuter corpus
as a testing environment and Machine Translation
(MT) evaluation toolkit of NIST as a similarity
measuring tool. It randomly chooses 1804 sentences
from about 190 files of three publication days to
compare with an existing stego system. The result
shows that the proposed system can enhance
integrity and confidentiality of secret information by
using error control techniques.
