Development of a hybrid system based on Cryptography and Steganography techniques

The digital media has become more popular than the traditional analog media since it witnessed a rapid decrease in the cost of processing, storage, and bandwidth. The digital data are easy to edit, modify and exploit. Therefore, it is convenient for people to transmit digital data and information t...

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Main Author:	Suhad Shakir, Jaber
Format:	Thesis
Language:	English
Subjects:	Cryptography Hybrid system Steganography Digital data Security of data
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/61573/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/61573/2/Full%20text.pdf
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spelling	my-unimap-615732019-08-29T01:22:01Z Development of a hybrid system based on Cryptography and Steganography techniques Suhad Shakir, Jaber Dr. Hilal Adnan Fadhil The digital media has become more popular than the traditional analog media since it witnessed a rapid decrease in the cost of processing, storage, and bandwidth. The digital data are easy to edit, modify and exploit. Therefore, it is convenient for people to transmit digital data and information through the internet. It is implied that information can be modified easily by unauthorized people. The security and the validity in digital communication have therefore become main issues. Different technologies have been developed to protect the digital data including cryptography and steganography. Cryptography protects the data by converting them into meaningless information; however, it gives an explicit indication about the protection process. Meanwhile, the steganography schemes have been applied to avoid the hint of protecting the data by hiding them in the cover data. In this project, the cryptography and steganography schemes are combined to develop a hybrid security system that can provide a secure communication between the sender and the receiver. This system uses the digital image as a carrier medium to embed the ciphered secret image. Firstly, the secret grayscale image is encrypted by using a popular encryption algorithm called Advance Encryption Standard (AES). Then, the encrypted image is hidden in a cover image (i.e., colour or grayscale) using steganography technique based on the Patch Reference Table Pixel Value Difference (PRT-PVD), which called APP. The APP is evaluated in terms of Peak Signal to Noise Ratio (PSNR), embedding capacity, and the ability to resist the steganalysis attach such as the histogram difference. The experimental results indicated that the proposed approach APP provided stego-images with a good perceptual quality; this was indicated by the obtained high PSNR values in comparison with the PVD, MFPVD, AES-PVD, and AES –LSB techniques. Apart from that, the difference histograms of the cover images and the stego-images are very minimal. For 128×128 grayscale cover images and payload of 20000 bits, the APP achieved an average value of PSNR of 48.7230 dB, while the average PSNR values of PVD, MF-PVD, AES-PVD, AESLSB and PRT-PVD techniques are 42.3399, 43.8579, 42.3639, 47.2249, 48.3877 dB, respectively. Moreover, the APP provides a higher PSNR for all experiments of different cover image (i.e., colour or grayscale) types and sizes (225×225, 512×512) with different payloads. In addition to improvement in performance, this study suggested a method that can automatically calculate the optimal threshold value for the APP system. As a result, using the proposed approach can improve the security of data transmission through the open channels. Universiti Malaysia Perlis (UniMAP) 2015 Thesis en http://dspace.unimap.edu.my:80/xmlui/handle/123456789/61573 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/61573/1/Page%201-24.pdf 43abd9792baaa665b281d3f0c52d9ea0 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/61573/2/Full%20text.pdf f58129bd6bced3f0800b6b010955d44b http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/61573/3/license.txt 8a4605be74aa9ea9d79846c1fba20a33 Cryptography Hybrid system Steganography Digital data Security of data School of Computer and Communication Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
advisor	Dr. Hilal Adnan Fadhil
topic	Cryptography Hybrid system Steganography Digital data Security of data
spellingShingle	Cryptography Hybrid system Steganography Digital data Security of data Suhad Shakir, Jaber Development of a hybrid system based on Cryptography and Steganography techniques
description	The digital media has become more popular than the traditional analog media since it witnessed a rapid decrease in the cost of processing, storage, and bandwidth. The digital data are easy to edit, modify and exploit. Therefore, it is convenient for people to transmit digital data and information through the internet. It is implied that information can be modified easily by unauthorized people. The security and the validity in digital communication have therefore become main issues. Different technologies have been developed to protect the digital data including cryptography and steganography. Cryptography protects the data by converting them into meaningless information; however, it gives an explicit indication about the protection process. Meanwhile, the steganography schemes have been applied to avoid the hint of protecting the data by hiding them in the cover data. In this project, the cryptography and steganography schemes are combined to develop a hybrid security system that can provide a secure communication between the sender and the receiver. This system uses the digital image as a carrier medium to embed the ciphered secret image. Firstly, the secret grayscale image is encrypted by using a popular encryption algorithm called Advance Encryption Standard (AES). Then, the encrypted image is hidden in a cover image (i.e., colour or grayscale) using steganography technique based on the Patch Reference Table Pixel Value Difference (PRT-PVD), which called APP. The APP is evaluated in terms of Peak Signal to Noise Ratio (PSNR), embedding capacity, and the ability to resist the steganalysis attach such as the histogram difference. The experimental results indicated that the proposed approach APP provided stego-images with a good perceptual quality; this was indicated by the obtained high PSNR values in comparison with the PVD, MFPVD, AES-PVD, and AES –LSB techniques. Apart from that, the difference histograms of the cover images and the stego-images are very minimal. For 128×128 grayscale cover images and payload of 20000 bits, the APP achieved an average value of PSNR of 48.7230 dB, while the average PSNR values of PVD, MF-PVD, AES-PVD, AESLSB and PRT-PVD techniques are 42.3399, 43.8579, 42.3639, 47.2249, 48.3877 dB, respectively. Moreover, the APP provides a higher PSNR for all experiments of different cover image (i.e., colour or grayscale) types and sizes (225×225, 512×512) with different payloads. In addition to improvement in performance, this study suggested a method that can automatically calculate the optimal threshold value for the APP system. As a result, using the proposed approach can improve the security of data transmission through the open channels.
format	Thesis
author	Suhad Shakir, Jaber
author_facet	Suhad Shakir, Jaber
author_sort	Suhad Shakir, Jaber
title	Development of a hybrid system based on Cryptography and Steganography techniques
title_short	Development of a hybrid system based on Cryptography and Steganography techniques
title_full	Development of a hybrid system based on Cryptography and Steganography techniques
title_fullStr	Development of a hybrid system based on Cryptography and Steganography techniques
title_full_unstemmed	Development of a hybrid system based on Cryptography and Steganography techniques
title_sort	development of a hybrid system based on cryptography and steganography techniques
granting_institution	Universiti Malaysia Perlis (UniMAP)
granting_department	School of Computer and Communication Engineering
url	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/61573/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/61573/2/Full%20text.pdf
_version_	1747836846319075328

Development of a hybrid system based on Cryptography and Steganography techniques

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