How to add a watermark to an SVG image for security purposes

we want to add watermarks to our SVG-Images to secure them from criminals. So just adding an image as a background for the SVG does not solve our problem.

Does anyone know a software or method to cryptonize such a watermark into an SVG? I think about a software that cuts the watermark image into multiple randomly cuts (polygons) and set them randomly inside the SVG on different positions.

I would be happy if someone could give me hints or help.

Thanks Christian