MinimaLT: Minimal-Latency Networking Through Better Security (2013) [pdf]

Small threads from 2014: https://news.ycombinator.com/item?id=8340389

and 2013: https://news.ycombinator.com/item?id=5755539

The recent thread titled "The world in which IPv6 was a good design (2017)" is also relevant:

https://news.ycombinator.com/item?id=20167686

After reading first couple of paragraph of this paper, Wireguard (https://www.wireguard.com) comes to mind. Then, they mentioned a research OS called Ethos (which seems to be defunct now). Did they figure out a more mainstream implementation?

I found this[0] implementation that does not require replacing the entire OS with Ethos, but I haven't yet tried it and cannot vouch for it.

[0] https://github.com/nimbus-network/minimalt