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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
Other Authors: Dr. Hilal Adnan Fadhil
Format: Thesis
Language:English
Published: Universiti Malaysia Perlis (UniMAP) 2019
Subjects:
Cryptography
Hybrid system
Steganography
Digital data
Security of data
Online Access:http://dspace.unimap.edu.my:80/xmlui/handle/123456789/61573
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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 Cryptography Hybrid system Steganography Digital data Security of data 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. 2019-08-29T01:22:01Z 2019-08-29T01:22:01Z 2015 Thesis http://dspace.unimap.edu.my:80/xmlui/handle/123456789/61573 en Universiti Malaysia Perlis (UniMAP) School of Computer and Communication Engineering
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
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.
author2 Dr. Hilal Adnan Fadhil
author_facet Dr. Hilal Adnan Fadhil
Suhad Shakir, Jaber
format Thesis
author 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
publisher Universiti Malaysia Perlis (UniMAP)
publishDate 2019
url http://dspace.unimap.edu.my:80/xmlui/handle/123456789/61573
_version_ 1651868560429940736
score 13.211869

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