Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/17471
Title: Information security A random image steganography perspective
Researcher: Amirtharajan Rengarajan
Guide(s): John Bosco Balaguru, R
Keywords: Communication secrecy
Information security
Steganography
Upload Date: 18-Mar-2014
University: SASTRA University
Completed Date: n.d.
Abstract: The depth of exploitation of the electromagnetic spectrum for connecting people newlinehas reached a new pinnacle with the name internet which has equally increased the newlinespectrum of demand for secrecy. In this context, steganography plays a key role in secret newlinecommunication to hide not just information, but the communication itself. The major goal newlineof steganography is to enhance the communication secrecy by infixing the secret message newlineinto the cover media namely gray and colour image. In this thesis, the process of newlineembedding the encrypted secret message in the digital image has been carried out both in newlinethe spatial and frequency domains with appropriate mathematical models. In spatial newlinedomain, the implemented random image stego system scans the colour and gray scale newlineimage, pixel by pixel along a complex path and hides secret data in the k bit of each pixel newlinevisited in the order defined by different types of space-filling curves (Moore and Hilbert), newlinemagic square, pulli kolam and tri-layer approach to improve the complexity of secrecy. In newlineaddition, an adaptive random and k-bit embedding approach namely Adaptive Random newlineInverted Pattern (ARIP) has been implemented to enhance the quality of the stego image. newlineThe random k-bit embedding stego method based covered writing has been implemented newlinewith an aim of achieving higher imperceptibility, payload, optimized key length and newlinemammoth complexity against hackers by significantly considering the nature of the secret newlinetext. In the frequency domain, an adaptive random image steganography using Integer newlineWavelet Transform (IWT) technique has been implemented to enhance imperceptibility, newlinecapacity and robustness of the stego image. Finally, a smart and novel random image newlinexix newlinesteganography has been proposed and implemented by optimizing the key size using newlinefrequency of the sinusoidal signal and pixel intensity. newlineThe effectiveness of all the implemented stego systems has been estimated by newlinecomputing eight different metrics namely number of bit errors, bit error rate, Mean newlineSquare Error (MSE), Peak Si
Pagination: xix, 215p
URI: http://hdl.handle.net/10603/17471
Appears in Departments:School of Electrical and Electronics Engineering

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01_title.pdfAttached File18.25 kBAdobe PDFView/Open
02_dedications.pdf22.67 kBAdobe PDFView/Open
03_acknolwledgements.pdf79.08 kBAdobe PDFView/Open
04_certificate.pdf94.83 kBAdobe PDFView/Open
05_declaration.pdf21.23 kBAdobe PDFView/Open
06_table_of_contents.pdf169 kBAdobe PDFView/Open
07_list_of_tables.pdf39.49 kBAdobe PDFView/Open
08_list_of_figures.pdf30.1 kBAdobe PDFView/Open
09_abstract.pdf63.18 kBAdobe PDFView/Open
10_chapter_01.pdf191.59 kBAdobe PDFView/Open
11_chapter_02.pdf940.75 kBAdobe PDFView/Open
12_chapter_03.pdf1.58 MBAdobe PDFView/Open
13_chapter_04.pdf1.2 MBAdobe PDFView/Open
14_chapter_05.pdf733.8 kBAdobe PDFView/Open
15_chapter_06.pdf1.02 MBAdobe PDFView/Open
16_chapter_07.pdf154.76 kBAdobe PDFView/Open
17_references.pdf460.1 kBAdobe PDFView/Open
18_appendix.pdf10.48 MBAdobe PDFView/Open


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