Add passwords to PDFs - Adobe Inc. Learn how to add password security to PDFs in Adobe Acrobat to restrict opening, editing, printing, or copying of documents
How to Password Protect Digitally Signed PDF Documents Select Require A Password To Open The Document, then type the password in the corresponding field For each keystroke, the password strength meter evaluates your password and indicates the password strength Select an Acrobat version from the Compatibility drop-down menu
Password Protecting and Encrypting Adobe PDF files To password protect and or encrypt a document using Adobe Acrobat Pro: Using Adobe Acrobat Pro, open the pdf file you want to password protect and encrypt Select File > Properties The Document Properties window opens Click the Security tab In the Security Method field, select Password Security The Password Security - Settings options display