Getting the file to the right person, no one else
Sharing securely
Expiring links, password-protected PDFs done right, sending sensitive docs to your accountant or lawyer, and the common mistakes that make "password-protected" meaningless.
Expiring links, access logs, and sending sensitive files to people who aren't technical
Most people you need to share a sensitive document with are not going to install a new app to receive it. Here's how to use the tools you already have — with the expiry, access logging, and revocation features turned on.
Level: beginner
Sharing sensitive documents with your accountant, lawyer, or doctor
You have to share tax returns, legal filings, and medical records with people who need them. Those people often aren't technical. A practical guide to sending sensitive documents to professionals — what's safe enough, what isn't, and how to push back when their workflow is insecure.
Level: beginner
Password-protected PDFs, done right
Password-protecting a PDF sounds simple, and most of the time it is done wrong in a way that offers almost no real protection. Here's how the feature actually works, and how to use it so it means something.
Level: intermediate
Sending documents by email without the email reading them
Email is the most insecure transport most people use every day. A practical guide to making it usably private — from the one-click options (ProtonMail-to-ProtonMail) through the real engineering (PGP, S/MIME) and the tradeoffs of each.
Level: intermediate