A New Hybrid Method for Colored Image Steganography Based On DWT

Document Type: Original Manuscript

Authors

Department of Computer Engineering, Tehran North Branch, Islamic Azad University, Tehran, Iran

Abstract

Data transmission security has become an extremely important field of research. Steganography is an art of hiding information in image, audio and video files in a way that would meet the security requirements in the form of overt or covert. In this study, we propose a new hybrid steganography technique for color images that hide secret messages in the frequency domain of a cover image's blue channel. Hence this method provide robustness against attacks, eavesdropping and capacity.  In addition, we use coding and compression algorithms to obtain high capacity along with security and maintains the quality of the cover image with considerable high value PSNR. In this paper a secret message can be either an image or text and our purpose is to improve three important parameters in steganography. Peak Signal to Noise Ratio (PSNR) values measures any steganography technique’s performance. Higher PSNR values indicate that the performance of   the system is better.

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