Performance Comparison of Robust Steganography Based on Multiple Transformation Techniques

Abstract

A technique which enables to have a secret communication in modern technology using public channel is known as steganography. In this paper, we propose Performance Comparison of Robust Steganography Based on Multiple Transformation Techniques (PCRSMT). The cover image intensity values are manipulated to accommodate payload properly and segmented into blocks of 4*4 each. Discrete Wavelet Transform (DWT) is applied on each block and in the resulting DWT coefficients, blocks of vertical band of 2*2 each are considered and Integer Wavelet Transform (IWT) is applied to get blocks of 1*1 each. The IWT is applied on the DWT vertical band of payload and then embedded into the IWT coefficients of the cover image. The concept of Error Detection and Correction Coding (EDCC) technique is employed to ensure more reliable communication. It is observed that the proposed algorithm has excellent PSNR, provides high level security and more robust compared to individual transform techniques.