Encrypt a PDF on a PC Using Adobe Acrobat
1. Open the PDF and choose Tools > Protection
2. Select Encrypt, then select Encrypt with Password
3. If you receive a prompt, click Yes to change the security.
4. From the Password Security-Settings menu, select from the options given to set various protections for the document. When you're finished making your selections, click OK.
IMPORTANT: When setting a password for a document, remember to save the password in a secure location, such as a password vault (TCIT recommends using LastPass for securely storing passwords. Contact the Service Desk to get LastPass)