Hey, have you ever heard from CJDNS? Wouldn’t it be not a option for syncthing to work over the CJDNS-Network-protocoll? => https://github.com/cjdelisle/cjdns It runs on OSX, OpenBSD, FreeBSD and other Linux-systems and even on Windows (http://meshbits.io/getting-started-with-hyperboria-cjdns-on-windows/).
The advantage to the current approadch of Syncthing would be, that even the metadatas are encrypted.
So for the spys it would be not even visible, that the datas are from Syncthing and it would be much more hard to see, who is transfering datas to who. As we saw in NSA-leeks, more interessting for spying countrys are the metadatas.
I wanted only to show you this option in case you haven’t heard from it before
I’m using the CJDNS-Network and it works great!