You can generate an specific number of random alphanumeric passwords formed by random uppercase letters. To open the Passwords windows, click on Edit Password(s) button, at the bottom of Protection tab.
You can add passwords manually or generate any number of them automatically by clicking on the Generate button at the bottom of the Passwords window.
Be aware that a password list only is useful when you use a Main key, Local keys cannot use a password list (see Protection tab for information about Local and Main keys).
The password list may be load from or save to a file (in text only format).
When you use multiple passwords, the reader should send you the number of password that the program automatically selected for him. In order to show the user the number you may include an include I.D. field in some page of the publication.