ABSTRACT

With the rapid increase of the internet users and the bandwidth is appreciable but at the same also brought some problems beside its advantages. The great facility in copying a digital content rapidly, perfectly and without limitations on the number of copies has resulted the problem of copyright protection. The ease with which duplication of digital information can be done has raised the need for us to take care of copyright and copyright protection mechanisms. One way to protect digital data against illegal recording or retransmission is to embed a signal, amount of data called a digital signature or copyright label or watermark that completely provides with the authentication or ownership of the user. In this work we propose a new algorithm through which we can embed more data than the regular methods under spatial domain. We compress the secret data using Huffman coding and then this compressed data is embedded using modified auxiliary carry watermark method. In this method our main contribution is towards increasing the amount of information which is to be embedded and at the same time increasing the security of the algorithm also.