A DWT based Steganography Scheme with Image Block Partitioning

Steganography is a branch of information hiding. It hides the existence of a secret message by embedding it in a cover media. In this paper, a new method for color image steganography is proposed in frequency domain where Discrete Wavelet Transform (DWT) of the cover image is used to differentiate high frequency and low frequency information of each pixel of the image. Proposed method hides secret bits in three higher frequency components making sure that the embedding impact on the cover image is minimum and not centralized in sensitivity domain. Experimental results reveal a good visual quality of the stego image with desirable steganalysis resisting characteristics.