How text watermarks work and what EU Article 50 requires
What it shows
A flatbed scanner with a keyed lock and a readout dial; its green reading bar stands for the detector that scores text for a hidden mark.
Its labels
- New: A detector that needs only the text and the key
- Scores are added up and compared with a threshold
- A secret key sets where the mark goes
The story
How text watermarks work and what EU Article 50 requires · 15 Oct 2026
An illustration is never a picture of what happened. Drawn on 15 Oct 2026.