A backup bot is an automated machine that allows you to automaticly download the whole world data to your own disk in a special period, typically daily once.
The phychi.com site allows you to use such a bot. To control who can download this data, there is a key you can set as world owner. Nobody else will know it unless you tell them. The access query for grabbing the data is POST, play.phychi.com/worldserver.php&world=yourWorldName&backup=1&token=yourBackupKey.