Digital Image Steganography

Topics: Discrete cosine transform, Steganography, JPEG Pages: 36 (10733 words) Published: September 11, 2013
JOMO KENYATTA UNIVERSITY OF AGRICULTURE AND TECHNOLOGY INSTITUTE OF COMPUTER SCIENCE AND INFORMATION TECHNOLOGY BSc COMPUTER TECHNOLOGY

Literature Review On DIGITAL IMAGE CRYPTOSYSTEM WITH ADAPTIVE STEGANOGRAPHY

NAME REG NO

: JOHN NJENGA : CS 282-0782/2009

SUPERVISORS: DR. OKEYO MR. J WAINAINA

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DECLARATION

I declare that all materials presented here are my own original work, or fully and specifically acknowledged wherever adapted from other sources. The work has not been submitted previously, in whole or in part, to qualify for any academic award. The content of the thesis is the result of work which has been carried out since the official approval of my proposal.

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Contents DECLARATION ............................................................................................................................ 2 LIST OF FIGURES ........................................................................................................................ 5 LIST OF TABLES .......................................................................................................................... 5 ABBREVIATIONS AND SYMBOLS ........................................................................................... 5 ABSTRACT .................................................................................................................................... 6 CHAPTER 1 ................................................................................................................................... 7 INTRODUCTION ....................................................................................................................... 7 1.1 BACKGROUND ................................................................................................................... 8 A Steganographic Framework .................................................................................................. 8 1.2 STATEMENT OF THE PROBLEM ..................................................................................... 9 1.3 OBJECTIVES OF THE STUDY ........................................................................................ 11 1.4.1 Specific Objectives ........................................................................................................ 11 CHAPTER TWO .......................................................................................................................... 12 2.0 LITERATURE REVIEW .................................................................................................... 12 2.1 Spatial Domain ............................................................................................................... 12 2.2 Transform Domain ........................................................................................................... 14 2.3 EXISTING ATTACKS .................................................................................................... 15 2.3.1 Steganalysis ................................................................................................................... 15 2.4.1.2 Blind Attacks .............................................................................................................. 18 2.3 STATISTICAL RESTORATION ....................................................................................... 20 Introduction ............................................................................................................................ 20 2.3.1 Embedding by Pixel ...................................................................................................... 21 Algorithm Pixel Swap Embedding......................................................................................... 22 3

2.3.1.1 Security Analysis........................................................................................................ 23 2.3.1.2 New Statistical Restoration Scheme...
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