How to Password Protect a PDF
Protect sensitive PDF files with a password so only authorised recipients can open them.
Password protect, encrypt, lock, and unlock PDF files.
4 articles in PDF Security
Protect sensitive PDF files with a password so only authorised recipients can open them.
PDF permission restrictions let you control exactly what recipients can do with your document — without requiring them to enter a password to open it.
If you know the password, removing PDF protection is straightforward. Here's how to do it.
PDF encryption uses AES — the same standard used in online banking. Here is how it works, and what it does and does not protect against.