A Research on Public Algorithm Digital Watermark

提出了数字水印的安全性准则，并研究了可公开算法的数字水印方案。第一个成果是开发了一个数字水印的评估工具，作为数字水印安全性的标准。该工具可以进行高效、统一的评价。第二个结果是数字水印的分类，根据应用和一些数字水印方案，可以公开的算法，如纸张文件水印，可见水印和可逆水印。这些结果可以作为讨论数字水印算法标准化或公开发表的第一步。

We constructed a criteria on security of digital watermark, and researched digital watermarking schemes which can open the algorithm up to the public. The first result is having developed an evaluation tool of digital watermarking to use as a criteria on security of digital watermark. This tool can perform efficient and unific evaluation. The second result is a classification of digital watermarking according to applications and some digital watermarking schemes which can open the algorithm up to the public such as paper document watermarking, visible watermarking and reversible watermarking. These results can be used as the first step of the discussion on algorithm standardization or public presentation for digital watermarking.