Abstract
We are now developing to apply the parameters of fractal image coding which are based on the construction of the image. These coding parameters show the correlations between the range blocks and the best matched domain blocks. Therefore, the information of addresses of best match domain blocks seems to make characteristics of their original images and we try to use them to authentication of the images. By the optimization of partitioned block sizes (range blocks and domain blocks), we obtain more accurate coding parameters even after applying the attacks based on the geometric distortions like a Stirmark attack.
