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# Changing security permissions for PDF files

Set a master password to restrict unauthorized printing, changing, copying, or extracting of a PDF file's content. Only users who have the master password can reset or change these restrictions.

- Encryption is possible only for scan files that are sent by e-mail or Scan to Folder and saved on a removable memory device.

- You cannot reset or change a file's restriction settings without the master password. Write down the master password and keep it secure.

1. Press [Send File Type / Name].

2. Check that [PDF] or [High Compression PDF] is selected.

3. Press [Security Settings].

4. Select the [Permissions] tab.

5. In [Master Password], select [Set].

6. In [Password], press [Enter].

7. Enter a password, and then press [OK].

   The password entered here will be required to change the security settings of the PDF file.

8. Enter the password again to confirm it, and then press [OK].

9. Select the security permission setting.

   You can specify the following security settings:

   - Print permission: [Prohibit], [Allow], or [Low Resolution Only]

   - Editing permission: [Prohibit] or [Allow]

   - Copying or extracting content permission: [Prohibit] or [Allow]

10. Press [OK] twice.

- The master password cannot be the same as a document password.

- Master passwords can contain up to 32 alphanumeric characters.

- If [40 bit RC4] is selected as the PDF encryption level, you cannot select [Low Resolution Only] as the print permission.