Use the command to encrypt PDF files and give permissions to users.

Do the following steps:

1. Click Browse to select the PDF file to encrypt.
2. Optional: Set the user and owner passwords for the encrypted file.
3. Select one or more user permissions to apply to the encrypted document for the user.
4. Select an encryption level (RC4 40-bit, RC4 128-bit, or AES 128-bit).
5. Specify the name of the output file.
6. Optional: Mark the check box to overwrite the existing output files with the same file name.
7. Click Save.