One of the comments on the TorrentFreak article compares BTSync to FTP. In one sense, that is not an accurate comparison at all. And yet, it has enormous poten

One of the comments on the TorrentFreak article compares BTSync to FTP. In one sense, that is not an accurate comparison at all. And yet, it has enormous potential to fill a similar role. The secret/passphrase amounts simply to a globally-addressable identifier to a set of folders that just happen to sync. It will be trivial to script a loop to watch a control file in a folder to enable automatic FTP-like transfers between my friends. Even without keeping the "secret" secret, instead simply treating it as public but discardable, you have something that can rival (and is a faster-moving target than) file lockers like Mega and Rapidshare (300 TB do not need to be re-uploaded in order to change the secret/address). The sad thing is that NAT and firewalls have starved the Internet to the point that that simple property (global addressing) seems almost miraculous. (And that is why IPv6 - or something permitting global addressability, instead of carrier-grade NAT - is so important going forward.)