A New Approach for Information Security using Asymmetric Encryption and Watermarking Technique

Rapid growth of internet and networked information systems has contributed a lot in the increase of multimedia contents. As digital contents are increasing day by day on internet it has raised requirement for the effective protection of multimedia assets (images, audios, videos). This paper proposes a new approach to protect the multimedia contents using image watermarking, asymmetric encryption and dictionary based compression. Approach presented in this paper hides target image in the host image using image watermarking and then apply RSA algorithm for protecting watermarked image from tempering and subsequently applies dictionary based compression approach to reduce size of encrypted watermarked image.