digital watermarking

Digital watermarking is a method of embedding hidden information into a digital media file—such as an image, audio, or video—without affecting its visible or audible quality. This embedded watermark serves as a digital signature or identifier, helping to verify ownership, detect piracy, or provide authentication. Because the watermark is concealed within the media's data, it remains intact even when the file is copied or altered slightly, enabling content creators and rights holders to protect and manage their digital assets effectively.