Research Journal of Information Technology1815-74322151-7959Science International10.3923/rjit.2013.363.372ThanikaiselvanV. SantoshK. ManikantaD. AmirtharajanRengarajan 3201353The Internet mostly uses insecure links, where information for communication
is put to test through its open exposure to interception. As far as information
is concerned, its safeguarding measures are of prime concern nowadays. Some
solution to be discussed is how to pass the not to be disclosed message in a
fashion that its subsistence is made unidentified to invaders. Stenography is
a hiding mechanism where the charisma of the secret is veiled by infixing the
same in cover files. Steganalysis is the field associated with steganography
detection by all its attributes which has now acknowledged much notice from
media, law enforcement etc. Chi square test is the one such statistical technique
used for steganalysis. This paper purports an algorithm for embedding data within
images such that the chi square test fails to detect the hidden information.
Merits and demerits of the algorithm are also discussed. Simple LSB substitution
along with proposed modified LSB substitution is discussed with the help of
PSNR and Chi square value. Another algorithm called as IPMCS (Increased Probability
of matching between Cover and Secret data) is introduced which can be used to
improve the image quality in terms of PSNR. It is important to know that IPMCS
works well only for those images whose PSNR value obtained after applying OPAP
is below a threshold value. Stegnographers should obtain stego outputs which
when seen from naked eye, are impossible to tell apart from their corresponding
covers.]]>Al-Frajat, A.K., H.A. Jalab, Z.M. Kasirun, A.A. Zaidan and B.B. Zaidan,2010Amirtharajan, R. and J.B.B. Rayappan,2012Amirtharajan, R. and J.B.B. Rayappan,2012Amirtharajan, R. and J.B.B. Rayappan,2012Amirtharajan, R. and J.B.B. Rayappan,2012Amirtharajan, R., J. Qin and J.B.B. Rayappan,2012Amirtharajan, R., R. Akila and P. Deepikachowdavarapu,2010Chan, C.K. and L.M. Cheng,2004Cheddad, A., J. Condell, K. Curran and P. McKevitt,2010Hansen, E.T.,2007Zanganeh, O. and S. Ibrahim,2011Padmaa, M., Y. Venkataramani and R. Amirtharajan,2011n: 1 Platform for users and embedding.]]>Provos, N. and P. Honeyman,2003Stefan, K. and A. Fabin,2000Thenmozhi, K., P. Praveenkumar, R. Amirtharajan, V. Prithiviraj, R. Varadarajan and J.B.B. Rayappan,2012Wang, R.Z., C.F. Lin and J.C. Lin,2001Zhu, J., R.D. Wang, J. Li and D.Q. Yan,2011