Bittorrent Sync

Is bittorrent sync really a good method of securely transfering files? It only uses 32bit key. I am just wondering if I want to share music or something with friends, would it be a good a idea?

If you want to securely transfer files, just use a flashdrive. If these files are legitimate, then there are no problems using any transfer method. Hell, set up a PPA for it, even.

If you what to send stuff to your frends set them up a ftp  

http://filezilla-project.org/download.php?type=server

http://www.techrepublic.com/blog/doityourself-it-guy/diy-set-up-a-filezilla-server-on-windows-7/763

considering sharing music is illegal (which i purchased), and my friends are in another state. it is hard to use a flashdrive.