Performance Evaluation of Image Steganography using Hybrid Technique in Frequency Domain

Abstract

Protection of digital multimedia content has become an increasingly important issue for content owners and service providers. The major methodology for protection of some digital content is- Steganography. Image Steganography is a process where information such as name of the creator, status, recipient, etc. is stored in the form of an image which is embedded into the host image in such a way that it will remain invisible or undetectable to a normal person. Only the intended recipient would be able to detect and remove the secret image. There are three main mutually conflicting properties of information hiding schemes: Imperceptibility, Robustness and Capacity. This paper measures the imperceptibility and robustness of the proposed system in terms of two parameters- PSNR and NC respectively. Now, while transmitting the image having some secret information embedded in the cover image, some attacks may arise on it which would degrade the quality of the secret image while extracting it. The technique is again tested against different attacks with varying attack intensities.