A New Image Steganography Technique to Hide Data on Byte Level Using DWT

Steganography is the art and science of concealing information in unremarkable cover media so as not to stimulate an eavesdropper's suspicion. This is an application under information security field and focuses on capacity. In this paper we propose a new image steganography technique which embeds a secret image in high frequency domains resulted from Discrete Wavelet Transform. Embedding of image is accomplished on byte level, while maintaining good visual quality of stego image. Coefficients in the low frequency sub-band are unaltered to retain the image quality.