Steganography

Introduction
Steganography
History
Classification
Working princple
Least Significant Bit (LSB) Substitution
Injection
Flow Chart
Steganography process
Image as a carrier
Pixel representation in RGB
Bandwidth reduced file transfer
Usage and Future application
Modern printers
Water marking
Future application
Conclusion
Table of Contents

Cryptology
Cryptography
Cryptanalysis
Steganography

STEGANOGRAPHY process
Three basic ways to encode data in steganography:
Image as a carrier
Pixel representation in RGB
Bandwidth reduced file transfer

1.IMAGE AS CARRIER:
It is an efficient technique for steganography, An image is used as cover for hiding the actual data. Digital images are a preferred media for hiding information due to their high capacity and low impact on visibility.
2.PIXEL REPRESETATION IN RGB:
Basic RGB color model, every pixel is represented by the four bytes namely Alpha, red, green, blue Alpha: degree of transparency Red: intensity of red color Green: intensity of green color Blue: intensity of blue color
The alpha bit is used to carry the data, as it has no much importance in image representation.

3.BANDWIDTH REDUCED TRANSMISSION:
If an image data takes six minutes to transfer between two systems and a text file takes 3 minutes. One can use steganography technique in order to reduce the time taking by embedding the text in the image and the total content will be transferred in six minutes.
Two basic algorithms used for steganography are
Text on Image algorithm.
Image on Image algorithm.

Two basic algorithms used for steganography
Text on Image algorithm.
Image on Image algorithm.
BASIC ALGORITHMS

Text on Image technique block diagram:
Image on Image technique block diagram:
IMAGE FILE
TEXT ON IMAGE ALGORITHM
TEXT EMBEDDED IMAGE FILE
TEXT FILE
IMAGE FILE
TEXT ON IMAGE ALGORITHM
TEXT EMBEDDED IMAGE FILE
IMAGE FILE
BASIC ALGORITHMS

ILLUSTRATION

http://mozaiq.org/encrypt/

ADVANTAGES
Internet privacy.
Secret communication between the organizations like boarder security force and defense organization.
Effective than that of cryptography.
Additional layer for security than cryptography.

ADVANTAGES

CONCLUSION