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Articles by Siva Janakiraman
Total Records ( 4 ) for Siva Janakiraman
  Siva Janakiraman , K. Thenmozhi , John Bosco Balaguru Rayappan and Rengarajan Amirtharajan
  The emergence of modern digitization has resulted in versatility to eradicate the divergence among the forms of information travel flanked by the users. This paper presents a pliable approach for the erratic block size selection in an impulsive mode to boost the level of sophistication in stego algorithm. An ingrained formula for key exchange, suggested in the algorithm combines the benefit of cryptography adjoining with steganography. In contrast to the usual implementations using generic software and personal computers, the suggested software development has been intense on an embedded device LPC 2378 with the RISC architecture that includes extensive support for networking through on-chip modules supporting ethernet and CAN protocols. The focal plan of this work includes elimination of key exchange for data encryption and improving the security to a massive level without compromising the image quality and embedding capacity. This endeavor shows the aptness of embedded hardware for stego implementations using an image carrier that makes soaring demand on memory; the extremely inhibited resource of embedded devices. The efficiency of the algorithm in maintaining image quality has been measured using the metrics MSE and PSNR. The enhancement in performance of embedded software, in terms of speed and code size have been analyzed under sophisticated compiler tools from KEIL MDK and IAREW.
  Siva Janakiraman , Rengarajan Amirtharajan , K. Thenmozhi and John Bosco Balaguru Rayappan
  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.
  Siva Janakiraman , K.V.Sai Krishna Kumar , R.Rohit Kumar Reddy , A. Srinivasulu , Rengarajan Amirtharajan , K. Thenmozhi and John Bosco Balaguru Rayappan
  The day to day amplification on technology and the demand on shrinking the device sizes reflect in the diminution on memory sizes and constraints on device outlay. In the present times of mass communication with the swift escalating technology, there is a dire necessity for security on the information traversing between authorized individuals. All these factors invite the property of light weightiness and the focused security algorithms such as Hummingbird for devices with humiliated resources. This study present an efficient software implementation of modified Humming Bird algorithm on an 8-bit microcontroller with randomization on sub-key selection based on LFSR. We also do comparative analysis on performance in terms of memory foot print and execution time between our modified one and the original algorithm implementations. The obtained results make it evident that the proposed method raises the complexity significantly without hike in resource consumption and makes it more suitable to provide security in extremely constrained devices.
  Siva Janakiraman , Jagannathan Chakravarthy , Badrinath Radhakrishnan , K. Thenmozhi , J.B.B. Rayappan and Rengarajan Amirtharajan
  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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