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Information Technology Journal
Year: 2012  |  Volume: 11  |  Issue: 1  |  Page No.: 9 - 19

Pixel Forefinger for Gray in Color: A Layer by Layer Stego

Siva Janakiraman, Rengarajan Amirtharajan, K. Thenmozhi and John Bosco Balaguru Rayappan    

Abstract: In the wake of cyber era, digital crime takes its shape in the schemes of modern warfare piercing existing security system without any collateral damage. The then existent cryptic army was either unable to stop the foes or had won a pyrrhic victory and thus evolved the war veteran, steganography that could withstand any destructive mechanism forced against it. Hence, in this study, three novel steganographic methods have been proposed to enhance the randomness of the mercurial data. All the three methods are implemented using the pixel indicator technology. Method one of the three uses the chosen pixel for guidance and as data channel for embedding. Method two takes a block of three pixels at a time where the first pixel acts as the steering channel while the remaining two become the data channel. Method three is further bifurcated; the first segment of this method involves the size definition within the first four pixels of the image and determination of that type of number i.e., even, prime or other. Depending on the type the channels red, blue or green are chosen as indicators, respectively. The second segment is where the size\value is checked for even parity and odd parity. Depending on its evenness or oddness the combination of data channel for embedding is arranged i.e., size is an even number with an odd parity red is the steering channel while the order of data channels are green and blue. The bifurcation and levels of selections increase the contingency of the embedment while retaining its reticence. Results confirm that the proposed methodology yield lesser error metrics while creating an efficacious channel to secure data transmission.

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