Image authentication using fractal watermarking and chaos theory

A new approach for embedding the authentication data using fractal and chaos technique is developed in this paper. This approach is to meet the need for authentication, including fragility and inalterability. Using chaos technique and the keyword extracted from the image itself, it is so unlikely to predict the blocks used for embedding the data. The first section is dedicated to introduce digital watermarking; the next section is prepared to review the fractal coding by which we can analyze our innovative approach proposed in section three. Results are presented in section four.