A novel image steganographic technique using fast fourier transform

Abstract

Steganography has always been competent in the field of data hiding by ensuring its remarkable behavior of preserving the secrecy of data. In order to maintain the secrecy of private data, the host data is being exploited to hide the information in such a way that it is unrecognizable to the human visual system thereby meeting the goals of steganography which are high embedding capacity, imperceptibility and robustness. Various amounts of work have been done in this field by a number of researchers. In this paper we have used a new image steganography technique using Fast Fourier Transform on the cover image Then the secret image is embedded into the two components of the cover image formed after applying the FFT on the cover image using the Least Significant Bit substitution method. The results obtained prove that this method is efficient and highly imperceptible to the human eye. The embedding capacity and the PSNR values clearly show the uniqueness of our proposed method.