Change the encryption passphrase to encrypt authentication passwords (such as user and account passwords) when printing data using a printer driver (default: [Use Factory default settings]).
[User-Defined]: Select this option when you want to set your own encryption passphrase. Tap [Encryption Passphrase] and enter the encryption passphrase (up to 20 characters). Set the same encryption passphrase in the printer driver, too.
[Use Factory default settings]: Uses the encryption passphrase (common key) set on this machine at the time of shipping.