An encryption passphrase is information used for encrypting the password that is sent to this machine for printing using the printer driver.
When printing is executed, some functions may send an authentication password such as the user password or account password. The password is encrypted using the encryption passphrase specified in advance in this machine. However, you can change the encryption passphrase when necessary.
To change the encryption password, you need to set the same encryption passphrase in this machine and in the printer driver.
This sets the encryption passphrase.
The password is encrypted with the encryption passphrase being set by the printer driver, and the encrypted password is transmitted to this machine. The password is decrypted with the encryption passphrase being set on this machine, and it is printed out or stored in the box.