Publications

Abstract : Since digital images are very susceptible to manipulations and alterations, a variety of security problems are introduced. Another common application is resolving ownership disputes when copyrighted material is distributed illegally. The objective of this paper is to avoid these problems by embedding a secret, invisible watermark (WM) in images. This proposes two publicly verifiable digital watermarking techniques for copyright property protection which includes the Secure Hash Algorithm (SHA) with chaos based random number generation and the other with Least Significant Bit(LSB) with data matrix techniques. With the comparison of these two watermarking techniques, the copyright information extracted from the watermark has good quality, less hardware complexity and is robust to various attacks.