A Novel Session Based Dual Steganographic Technique Using DWT and Spread Spectrum

TL;DR

This paper introduces a new session-based dual steganographic method utilizing DWT and spread spectrum techniques to embed two secret images into cover images with high security and acceptable imperceptibility.

Contribution

It presents a novel DWT-based steganographic approach that embeds two secret images in different sub bands using session keys and pseudo-random dispersion.

Findings

Stego images maintain high imperceptibility.

Embedding process is secure with session keys.

Secret images are accurately extracted using the proposed method.

Abstract

This paper proposed a DWT based Steganographic technique. Cover image is decomposed into four sub bands using DWT. Two secret images are embedded within the HL and HH sub bands respectively. During embedding secret images are dispersed within each band using a pseudo random sequence and a Session key. Secret images are extracted using the session key and the size of the images. In this approach the stego image generated is of acceptable level of imperceptibility and distortion compared to the cover image and the overall security is high.