+Use friend-of-friend from me.
+Use swarm from bittorrent.
+Use DHT from Kazaa.
+Use history log from git.
+Use inbox/outbox from pump.io.
+Use forward-secrecy from OTR.
+Use split-key recovery from ??.
+Use web of trust from GPG.
+Use routing from B.A.T.M.A.N.