| ABSTRACT |
Transmitting data over a public network such as the internet necessitates increasing the security of data communications ; especially with the highly sensitive document transfer. Steganography technique have been introduced and developed to provide security to these applications. Fundamentally, the steganography goal is not only to hinder the adversary from decoding a hidden message, but also to prevent an adversary from suspecting the existance of covert communications. It does not replace cryptography but rather improves the security using its obscurity features. If one¿s suspicious is raised while using steganography technique, the goal of the latter will be defeated regardless whether or a not plaintext is revealed. In this research, a newly designed steganographic system called characteristic region-based image steganography (CR-BIS). It combines both the robustness of Speeded-Up Robust Features techniques (SURF) and Discrete Wavelet Transform (DWT) to achieve characteristic region steganography synchronization. It avoids hiding data in the whole image by dynamically selecting characteristic regions for the process of embedding.
|
