Data Embedding in Gray Scale Image Using Wavelet Transform for Secure Communication

Abstract- In this world now a day, secure our information plays a vital role because, the unauthorized person may misuse the information (or) data during the transmission across the wireless link. In order to avoid this type of situation, our project introduced the method called secure data transmission. In this method, wavelet based steganography is used. A wavelet based steganography is a new idea in the wavelet application. There are two process involved in this method. They are embedding process and extraction process. The concept of this paper is, a message is embedded in to the cover image C through an embedding algorithm using secret key. So, that the cover image (C) is changed to stego image (S).The stego image is then transmitted through the Stegosystem(Channel) and it can be extracted using the same secret key through an extraction algorithm. During the transmission, the unauthorized person may have the chance to monitor the image but he/she can monitor only the image without discovering the existence hidden message. The pixels in the cover image(C) is selected for embedding the information using pixel mapping method. So, there will be no degrading in the stego image(S) compared to the cover image(C)