【Key words】 digital watermarking； watermark attack； watermark security； watermark robustness； asymmetric watermarking； symmetric watermarking；
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The task of the research on the watermark security is to prevent watermark from being removed or modified maliciously when the watermark detection method is public.
对于水印安全性研究，由于假定公开检测而使防止水印不被非法删除或修改非常困难。
参考来源 - 数字水印技术研究与应用·2,447,543篇论文数据，部分数据来源于NoteExpress
The method has very good watermark security and the watermark is extracted without using original unwatermarked image.
该方法嵌入的水印具有非常好的安全性，且水印提取不需要原始未加水印的图像。
An digital image watermark algorithm is proposed based on the synergetic neural network, combined with encryption technique, to guarantee its robustness and security.
为保证图像数字水印的鲁棒性和安全性，结合加密技术，提出了一种使用协同神经网络的图像数字水印算法。
The security features of the former 10, 000 yen notes were the watermark, the use of ultrafine line printing, and luminescent ink.
前一版10000元钞票的防伪特征是水印、精细线条印刷和发光油墨。
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