Microsoft AI watermarks in Paint and Photos are linked to user IDs, researcher finds
What happened
A researcher found that Microsoft Paint and Photos embed a server-issued GUID (a 16-byte identifier) into AI-generated images. The GUID ties the image to the prompt lifecycle and is issued after Microsoft receives and moderates the prompt, meaning the link to user-created prompts exists outside the visible watermark option. Buyers should verify supplier disclosure and contract controls for metadata, retention, and the ability to opt out or control GUID issuance
Why the category manager should care
Treat vendor metadata embedding as a contractual risk area: if GUIDs are linkable to users or prompts, buyers need explicit controls on issuance, retention, and auditability
Key facts
- Embeds a server-issued 16-byte GUID linked to prompts
- GUID issuance occurs after server-side moderation
- GUID is distinct from visible watermark options