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| Articles
by
Jagannathan Chakravarthy |
Total Records (
1 ) for
Jagannathan Chakravarthy |
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Siva Janakiraman
,
Jagannathan Chakravarthy
,
Badrinath Radhakrishnan
,
K. Thenmozhi
,
J.B.B. Rayappan
and
Rengarajan Amirtharajan
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Communication playing the key role of daily lives has created
revolutions since the Stone Age. In this fast-paced technological world, the
utilization of information has gained towering momentum. Furthermore, information
while transmitted over the internet with the swift escalation in the mass media
and digital communication technology, the requirement for impregnable covert
channel arises especially when critical information has to be communed. Over
the years, Information hiding techniques have evolved to conceal any critical
data in cover files like images, audios and videos and thus, certifying the
genuineness and secrecy of the transmitted data. Steganography is one such method
where the very existence of the data in the cover image is hidden and thereby,
provides for security by making the hidden data unconceivable. The cover file
may include audio, video or image files. In this study, two methods have been
proposed to embed image within an image with two and three layers of security,
respectively. A decoder circuit is used in one of the layers to embed the data
not only in the LSB bits but also in the other bits of the lower nibble. Moreover,
two bits of data are embedded in a pixel by changing only one bit of the pixel.
These methods show improved security without compromising on the PSNR and MSE
values. |
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