通过在原始数据中嵌入秘密信息--水印来证实数据的所有权 。这种被嵌入的水印可以是一段文字、标识、序列号等 ，而且这种水印通常是不可见或不可察的 ，它与原始数据紧密结合并隐藏其中，并可以经历一些不破坏源数据使用价值或商用价值的操作而能保存下来 。-By secret information- the watermark is embedded in the original data to verify the ownership of the data. This embedded watermark can be a piece of text, logos, serial number, and the watermark is usually not visible or can not detect, which is closely integrated with the original data and hide, and you can experience some of the source data does not destroy the value in use or the operation of the commercial value can be preserved.