How to Protect PDF Files by Setting Security Permissions
For example, to permit only the users that have a password to access the document and also to
      restrict their printing and copying capability, you can use the following parameter
        combination:
    | Parameter | Value | Description | 
|---|---|---|
| pdf.security.owner.password | <OWNER PASSWORD> | People using this password will be able to open the document, with full permissions. | 
| pdf.security.user.password | <USER PASSWORD> | People using this password will be able to open the document, but they will not be able to print. | 
| pdf.security.restrict.print | yes | Restricts users from printing. | 
| pdf.security.restrict.copy | yes | Restricts users from copying content. | 
Important: 
    If you specify just the user password (without an
      owner password), then the people using it will be considered owners, and no restrictions will
      apply to them. 
