Information hiding by using steganography

Dissertant

Muhssin, Salah Talib

University

University of Technology

Faculty

-

Department

Applied Sciences Department

University Country

Iraq

Degree

Master

Degree Date

2004

English Abstract

It's known that hiding a text in Image is done by using (ASCII) code against each text as a value for hiding and all studies in this field depend on this principle. This study deals with text as being an image no a group of tetters, as a result hiding operation depends on hiding image within image.

In order for the operation not to be free from complications, in order to have obstacles in the way of the attacker act, the image of the text is turned to a group of numbers and values to represent each parallel values.

The first represents number of second value frequency.

This value is treated on a base, which represents color value through store in RMP value, Consequentially one has arbitrary colored image much bigger than the secret letter as a first stage of complexity operation. Hiding image within image is hiding complete secret image in the cover (image data, files information and colors index) by dividing it to a group of values hidden in sections inside the cover (image file).

The position of these values is indicated in the beginning of each section by using a method of (LSB) i.

e.

as a method lo encodes hidden data position.

not as a tool for hiding A key that helps to crypt secret text operation is hidden in the cover in a way which makes it is not discovered. Evaluation performed on the work by studying the differences in original image and efficient hidden data image illustrates no great difference.

The little difference is due to noises through trans formation because they are too little.

The calculation of secrecy and similarity reveals good results.

Main Subjects

Information Technology and Computer Science

Topics

• Writing
• Encryption
• Symbolism
• Data

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-306023