A password-protected PDF encrypts the document - anyone opening it is asked for the password first. It is the right tool when a document contains personal or confidential information and must be sent through email or shared drives.
Steps
Open the Protect PDF tool and upload your PDF
Choose a strong password
Click Protect and download the encrypted file
Share the password separately from the file (never in the same email body)]
Choosing a password
Use at least 10 characters mixing letters, numbers and symbols
Do not reuse your account password
If the recipient is a colleague, agree on a shared phrase verbally rather than emailing it
Need the opposite?
If you have a PDF you legitimately own that is locked and you know the password, use Unlock PDF to remove the password and get an unrestricted copy.