The article discusses the emergence of 'spymarks', hidden signals embedded in media to track its origin, tools, or distribution history without the user's knowledge or consent. These spymarks can be used to encode personal information, such as database identifiers, and can survive compression or re-encoding. The article argues that spymarks are different from traditional watermarks, which are typically visible and used to verify authenticity or assert ownership. The use of spymarks raises concerns about privacy and surveillance.