Abstract:
Steganography is the technique that hides the presence of a secret data in a cover-medium without drawing the attention of unauthorized viewers. So, with the fact that the internet acts as common channel, the problem of information security arise, Steganography is one of the techniques used to resolve this problem. In fact there are many image-based steganography techniques in use, and there are several problems arise due to distortion of stego-image produced after embedding the secret data, and error swill be occurred during restoration the sent image. Therefore, the primary objective of this thesis is to compare between some of them, two in the image spatial domain (LSB and PVD) and the other are in its frequency domain (IWT and DCT). to chose the best one suitable for securing data through internet applications. In order to achieve the goal, the mentioned techniques will be studied, analyzed and evaluated in terms of restored message accuracy and quality of the produced stego-image. Then the graphical user interface (GUI) for the best one will be designed to give easy usage for the program users.
