With Fubario, you and one or more friends lend each other some spare disk space, and then you each store backups of your files on the other person's computer.
Is this safe? Yes! Fubario uses encryption for all communications between you and your friends. Also, your backup files are encrypted so that not even your friends can read the files you are backing up. Having said that, we recommend that you back up to people you know, not strangers off the net. Also, we suggest that you back up to more than one friend, to maximize the safety of your files.