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Project Seminar on Steganography

Using LSB Substitution Method

Submitted By -

Iti Sri

1KS09CS033

Kumari Pallavi

1KS09CS057

Manan Bakshi

1KS09CS034

2/26/2013 1Department of Computer Science &Engineering,KSIT,Bangalore

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Table of Contents

Introduction to Steganography

Review of Literature

Motivation Problem Definition

Objectives

System Requirements References


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What is Steganography?

Greek Words:STEGANOSCovered

GRAPHIEWriting

Steganography is the art and science

of writing hidden messages in such a

way that no one apart from the

intended recipient knows of the

existence of the message.

This can be achieve by concealing the

existence ofinformation withinseemingly harmless carriers or cover

Carrier: image, video, audio, etc.


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Watermarking vs. Steganography

Goal of steganography

Intruder cannot detect a message

Primarily 1:1 communication

Goal of watermarking

Intruder cannot remove or replace the message Primarily 1:many communication


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Steganography, Cryptography, and Watermarking

There are two major branches of information hiding,Steganography and Watermarking

Watermarking: Communication in watermarking is the host signal, with

the embedded data providing copyright protection.

The existence of a watermark is often declared openly.

Any attempt to remove or invalidate the embeddedcontent renders the host useless.


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Cryptography:

Doesnt conceal the communication. Scrambles the data to prevent eavesdroppers

understanding the content. Cryptography involves various methods and

implementations. May be considered complementary and

orthogonal (unrelated).

Once the presence of hidden information is revealedor even suspected, the purpose of steganographyis defeated.


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we can hide the message by substituting the

LSB of each pixel with information bits in 24bpp RGB image. 24 bpp RGB image is a 24 bit

depth colour image using RGB colour model.

24 bit refers to 8 bit for each RGB colourchannel, i.e. 8 bits for red, 8 bits for green and

8 bits for blue.


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This implies that we can store three bits of

information per pixel at the LSB of RGB. By

changing the LSB of RGB values of each pixel,

we may get maximum 2X2X2=8 different

shades. This change in the pixel bits will be

indiscernible to the human eye


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Literature Review

M. M Amin, M. Salleh, S . Ibrahim, M.R.K Atmin, and M.Z.I.

Shamsuddin, Information hiding using steganography, IEEE 4th National

Conference on Telecommunication Technology Proceedings, Shah Alam,

Malaysia, pp. 21-25, January 2003.

Deshpande Neeta, Kamalapur Snehal and Daisy Jacobs, Implementation

of LSB steganography and its evaluation for various bits, IEEE 1st

International Conference on Digital Information Management, India, pp.

173-178, December 2006.

S .K. Moon and R.S. Kawitkar, Data security using data hiding, IEEE

International Conference on Computational Intelligence and Multimedia

Applications, India, pp. 247-251, January 2007


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Literature Review Contd

A Vadivel, A.K.Majumdar and Shamik Sural, Performance comparison of

distance matrices in context-based image retrieval applications, IITkharagpur research work.

Beenish Mehboob and Rashid Aziz Faruqui, A steganographyimplementation, IEEE-International symposium on Biometrics & securitytechnologies, ISBAST, Islamabad, April 2008.

Gandharba Swain and Saroj Kumar Lenka, A hybrid approach tosteganography embedding at darkest and brightest pixels, Proceedings ofthe International Conference on Communication and ComputationalIntelligence ,Kongu Engineering College, Perundurai, Erode, T.N., India,pp.529-534, December 2010.

V. Lokeswara Reddy, Dr. A. Subramanyam and Dr.P. Chenna Reddy,Implementation of LSB steganography and its evaluation for various fileformats, Int. J. Advanced Networking and Applications, vol. 2, pp.868-872,2011.


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Motivation

Steganography received little attention in computing

Renewed interest because of industry desire to protect

copyrighted digital work

audio images

video

Text

Detect counterfeiter, unauthorized presentation, embed key,

embed author ID


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Problem Definition

Conventional LSB technique uses the least significant

bit of consecutive pixels for embedding the message

which draws suspicion to transmission of a hidden

message. If the suspicion is raised, then the goal ofsteganography is defeated.


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Objectives

Increase The robustness of Algorithm by

using keyless steganography

Propose a novel technique to hide

information in a 24 bpp RGB image usingmodified LSB substitution method.

Security Enhancement in Comparison with

Conventional AlgorithmsTo Increase Capacity of storing information

per pixel.


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Software Requirements

Application Used for Development:-

Language:- Java (jdk6)

Development Tool:-Eclipse, Notepad

Platform:-Cross Platform

Essential Software:-Java Runtime Environment


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Hardware Requirements

1 Mega Byte disc space.

Minimum 512 MB RAM.

Pentium 3 or above processor.

700 MHz processor speed.


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References

Petitcolas, F.A.P., Anderson, R., Kuhn, M.G., "Information Hiding - ASurvey", July1999, URL:http://www.cl.cam.ac.uk/~fapp2/publications/ieee99-infohiding.pdf(11/26/0117:00)

Farid, Hany, Detecting Steganographic Messages in Digital Images

Department of Computer Science, Dartmouth College, Hanover NH 03755 Moby Words II, Copyright (c) 1988-93, Grady Ward. All Rights Reserved.

Lyu, Siwei and Farid, Hany, Steganalysis Using Color Wavelet Statistics andOne-Class Support Vector Machines, Department of Computer Science,Dartmouth College, Hanover, NH 03755, USA

Farid, Hany, Detecting Hidden Messages Using Higher Order StatisticalModels Department of Computer Science, Dartmouth College, HanoverNH 03755


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Wikipedia

Exploring Steganography: Seeing the Unseen

N. Johnson & S. Jajodia

www.jjtc.com/stegdoc/steg1995.html

Information Hiding: Techniques for

Steganography and Digital Watermarking S.Katzenbeisser, F. Petitcolas

Digital Watermarking H. Bergel, L.

OGorman

http://en.wikipedia.org/wiki/Steganographyhttp://en.wikipedia.org/wiki/Steganography

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Thank You !


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