Guides
What your files say about you, and what to do about it.
- What your photos reveal
GPS position, serial numbers and hidden thumbnails, and how to see them for yourself.
- How to check a PDF for hidden data before you send it
Author names, old versions, comments, attachments and invisible text.
- Why blurring text is not redaction
Blur and pixelation can be undone. A solid box, done properly, cannot.
- Removing location from iPhone and Android photos and videos
The built-in phone settings, and how to clean what you have already taken.
- Office files: comments, tracked changes and author fields
What Word, Excel and PowerPoint keep about who wrote what, and what was deleted.
- How to check that a website does not upload your files
The airplane-mode test, and two more ways to check a "nothing is uploaded" claim.