Wavelet based Secure Steganography with Scrambled Payload

Abstract – The Steganography is used for secure communication of information by embedding information in a cover object. In this paper we propose Wavelet based Secure Steganography with Scrambled Payload (WSSSP). The Daubechies Lifting Wavelet Transform (LWT) is applied on cover image. The XD band is decomposed into upper and lower bands for payload embedding. The payload is segmented into four equal blocks. The Harr LWT is applied on alternate blocks of payload to generate F1 and F2 wavelet transform bands. The remaining blocks of payload are retained in spatial domain say S1 and S2. The bit reversal is applied on each coefficient of payload blocks to scramble payload. The cube root is applied on scrambled values to scale down the number of coefficient bits. The payload the embedded into XD band of cover image to generate step object. The decision Factor Based Manipulation (DFBM) is used to scrambled stego object. The Daubechies ILWT2 is applied on stego object to obtain stego image in spatial domain. It is observed that PSNR and capacity of the proposed algorithm is better compared to existing algorithm