A Real Time Approach for Image Steganography using Graph Theory and IWT

Image steganography consists hiding of secret information inside the cover medium. Cover medium may be image file, video file or audio file. Cover file depends on size of information. Mainly they have two types of techniques available for steganography. One is spatial domain steganography and another one is Transform domain steganography. The main objective to be considered in the steganography method is high imperceptibility, due to high imperceptibility viewer cannot view the secret information inside the stego image. In this paper, a transform domain steganography is used for color image. Here integer wavelet transform is applied to each and every R, G, B planes of the image and then information is embedded separately in R, G, B planes. The proposed method is highly capable, rebustness and simple. Therefore we have be used to transfer very highly confidential information like military secrets and etc.