Design and Development of Steganography Using Hybrid Transform with Decomposition Based Embedding Algorithm and Hybrid Encryption Scheme

摘要

Steganography is a technique used to hide the information inside the text or picture. In this paper, an effective and robust image security framework proposed for the images using Steganography. In this paper, a novel digital image watermark security scheme is applied which incorporatesDiscrete Wavelet based Transformation and Singular Value based Decomposition, so it’s called as Hybrid embedding algorithm (HDWT-SVD). It uses image as cover image for embedding secret image. In this proposed scheme, SVD with DWT schemes introduced to embed a watermark in an input coverimage. Then, the resultant image is encrypted by using multiple chaos key stream based baker map with AES method. After that, some types of attacks such as scaling, salt and pepper noise, rotation and Gaussian noise are applied to encrypted image. Finally, the performance of proposed schemeis evaluated by PSNR and MSE values. The proposed method has achieved PSNR of 0.72 and MSE of 0.018. The simulation results show that the proposed HDWT-SVD scheme attains better values compared with hybrid encryption scheme and PSO based optimized encryption scheme. This proposed scheme canbe implemented in multimedia applications, online banking and medical imaging for secured communication.