Comment by uyzstvqs

Yggdrasil is a decentralized mesh IPv6 network. It automatically forms one big network as more people connect together. It has end-to-end encryption, it's fast (unlike darknets), and it's pretty simple.

In such a "splinternet" scenario, it'd be a matter of setting up PTP links across borders. As long as a few people do so, it becomes one big network again.