Secured and Authentic Communication by Combined Approach of Digital Watermarking and Steganography

The rapid evolution of the Internet makes the transmission of digital multimedia content such as text, audio, images, and video easier. Digital media can be accessed or distributed through the network. As the communication over internet is easier and convenient, the security is the main concern. And one of the issues is authenticity of contents. There are two different approaches to achieve security and authenticity. One of the approaches for secured transmission is steganography in which secrete message is hidden behind the image. For authenticity, digital watermarking is a technique which embeds a digital signature or digital watermark that asserts the ownership or intellectual property rights of the media creator or owner, in the digital media such as text, audio, image, and video. In this paper a hybrid approach is being proposed, in which watermarking and steganography techniques have been combined, which exploits the advantages of both techniques resulting more robustness against different types of attacks.