Case Studies — Security
Invisible PDF Watermark Tracker
Python tool that embeds invisible, document-specific watermarks into PDFs — enabling precise source tracing if a document is leaked.
Challenge
Sensitive documents distributed internally with no forensic trail — no way to trace leaks back to a specific recipient when confidential PDFs surfaced externally.
Solution
Developed a Python program that embeds a unique, invisible watermark into each distributed PDF copy, encoding recipient identity without altering visible content. Each variant carries a distinct, machine-readable signature.
Outcome
Every distributed document now carries a unique invisible fingerprint. Leaked documents can be traced back to their source instantly. No visible change to document appearance — fully transparent to recipients.
Tech Stack
- Python