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Steganalysis based on JPEG compatibility
Other Title(s)
تحليل الكتابة المخفية المبني على أساس تناسقية ال JPEG
Dissertant
Thesis advisor
University
University of Baghdad
Faculty
College of Science
Department
Department of Computer Science
University Country
Iraq
Degree
Master
Degree Date
2004
English Abstract
Steganalysis is a relatively new branch of research.
While steganography deals with techniques for hiding information.
The goal of steganalysis is to detect and/or estimate potentially hidden information from observed data with little or no knowledge about the steganography algorithm and/or its parameters.
In general, extraction of the secret message could be a harder problem than mere detection.
In this research we describe a new steganalytic technique that can detect modifications in color images, such as those due to steganography and watermarking, as long as the original image (the cover image) has been previously stored in the JPEG format.
The steganalytic technique starts with extracting the JPEG quantization matrix by carefully inspecting the clusters of DCT coefficients.
Then, each block is analyzed if its pixels values are truncated values of an inverse DCT transform of a set of coefficients quantized with the extracted quantization matrix.
A simple necessary condition is derived that makes the analysis computationally feasible.
If the corresponding quantized DCT coefficients are found, the block is termed compatible, otherwise it is not.The steganalytic technique will work for many steganographic methods such as (S-TOOLS4, HIDE4PGP, and HIDE IN SEQUENTIAL LSB), except the methods that embed information directly into the compressed JPEG stream.
One of the important conclusions drawn is that a new value for the equation of the quality condition adopted drawn from the result rather than the mentioned value in the researchs.
This adopted system can be used with true color images rather than gray level images
Main Subjects
Information Technology and Computer Science
No. of Pages
103
Table of Contents
Table of contents.
Abstract.
Abstract in Arabic.
Chapter One : Introduction.
Chapter Two : Image representation and image compression.
Chapter Three : Steganography and steganalysis.
Chapter Four : System implementation (steganalysis based on JPEG compatibility).
Chapter Five : Conclusion and suggestion for future work.
References.
American Psychological Association (APA)
al-Tai, Mayy Muwaffaq Abbas. (2004). Steganalysis based on JPEG compatibility. (Master's theses Theses and Dissertations Master). University of Baghdad, Iraq
https://search.emarefa.net/detail/BIM-604775
Modern Language Association (MLA)
al-Tai, Mayy Muwaffaq Abbas. Steganalysis based on JPEG compatibility. (Master's theses Theses and Dissertations Master). University of Baghdad. (2004).
https://search.emarefa.net/detail/BIM-604775
American Medical Association (AMA)
al-Tai, Mayy Muwaffaq Abbas. (2004). Steganalysis based on JPEG compatibility. (Master's theses Theses and Dissertations Master). University of Baghdad, Iraq
https://search.emarefa.net/detail/BIM-604775
Language
English
Data Type
Arab Theses
Record ID
BIM-604775