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Title: Improved rapid AES for secure digital images
Researcher: Anuradha Konidena
Guide(s): Somesh Kumar
University: Noida International University
Completed Date: 
Abstract: With the fast evolution of digital data exchange, security of information becomes much newlineimportant in data storage and transmission. The basic AES that is used for text encryption newlinecannot be used for exchange for image encryption, because of the size and correlation newlinebetween pixel constraints. so to enhance performance of the AES for image encryption newlinesome changes in the standard method are required. newlineIn this work performance of Advanced Encryption Standard is improved by modifying newlinebasic operations which are known to the intruders. newlineand#61623; As the standard S-Box and inverse S-box is strong enough to various cryptanalysis newlineattacks its logic is retained. newlineand#61623; Shift Rows (Cyclic Left Shift): This operation shifts the rows by certain offset: newlineFirst row by two bit shift, second row by three bits, third row by 4 bits and 4th row newlineby one bit. newlineand#61623; The Mix Column transformation, called Mix Columns, operates on each column newlineindividually. Each byte of a column is mapped into a new value that is a function newlineof all four bytes in that column. The transformation can be defined by the newlinefollowing matrix multiplication newlineand#61623; In this AddRoundKey transformation, each byte of the state is combined with the newlineround key using XOR, i.e. the 128 bits of state are bitwise XORed with the 128 newlinebits of the round key newlineand#61623; After XOR operation between state and Key the resultant will be Left shift by n newlinebit where n is the number of the round, before proceeding further. This operation newlineincreases the complexity but reduces the correlation between pixels of the image .It newlinegives strength to cipher image. Left shift operation can be easily implemented by newlineshift register. newlineand#61623; MATLAB is used for implementation of proposed method. newline
Appears in Departments:Department of Computer Science and Engineering / IT

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01_title.pdfAttached File65.87 kBAdobe PDFView/Open
02_certificate.pdf141.79 kBAdobe PDFView/Open
03_contents.pdf98.34 kBAdobe PDFView/Open
04_acknowledgement.pdf43.98 kBAdobe PDFView/Open
05_chapter 1.pdf447.08 kBAdobe PDFView/Open
06_chapter 2.pdf459.48 kBAdobe PDFView/Open
07_chapter 3.pdf245.72 kBAdobe PDFView/Open
08_chapter 4.pdf648.51 kBAdobe PDFView/Open
09_references.pdf205.89 kBAdobe PDFView/Open

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