You can add passwords to PDF files you create in the PDF Create Assistant and prohibit or allow actions, such as printing, extracting content and editing. Select a profile, then a setting in the Security drop-down list and click Advanced to specify passwords and permissions.
You can specify two passwords types: Open or Permissions.
- Open Password
- Use an open password (sometimes called a user password) to view PDF files. Use the PDF for purposes other than viewing if the appropriate permissions are set.
- Permissions Password
- Use a permissions password (sometimes called a master or owner password) to view and use a PDF freely, regardless of permissions settings. You can also modify, remove or add permissions settings.
- Before setting permissions, you must supply and confirm a permissions password and specify the encryption strength: 40-bit, 128-bit or 256-bit. Encryption strength determines which permissions are available.
Use New to name a new standard security control, or Delete to remove a security control. Use Default to return supplied controls to default values and remove user-defined controls.
Be sure to note the passwords you assign; without them you cannot reopen PDF files that you create. Successful PDF protection depends on good password management.
Older PDF viewers may not support encryption above 40-bits. See About PDF Versions.
PDF Create usually creates standard PDF files that can be viewed, printed, searched and modified in a PDF editor. If some actions are prohibited and a user cannot supply the correct permissions password, the PDF may appear as image-only.