Abstract: A device (100) and a method for password generation. When password generation is triggered (S20), a processor (110) of the device (100) applies (S21) a function to constant and non-constant parameters in or around the device (100) to obtain a value from which the password is generated (S22). A password authentication value is generated (S23) from the password and stored. In case of an administrator password, the password is encrypted using a public key (S24) and stored; in case of a network password, the password is sent (S25) through a one-way connection to a storage device such as a persistent electronic display (150) on which information rests even without power supply. The processor (110) finally deletes (S26) the generated password so that it is only displayed on the display (150).