EVALUATION OF DIGITAL IMAGE WATERMARKING TECHNIQUES

The advancing world of digital multimedia communication is facing problems linked to security and authenticity of digital data. The data security term is described as protecting information or digital data against any attack that may be performed by utilizing different attacking technologies, methods and techniques. A watermark system is reported to be secure, if the hacker cannot take away the watermark without full knowledge of embedding algorithm, detector and composition of watermark. This paper has shown the survey on image watermarking and its various techniques. From the survey it has been concluded that none of the technique performs effectively in all fields. Keywords— CZT, DWT, Image Watermarking, Negative Selection Algorithm, SVD