Yggdrasil

The Yggdrasil project provides a legitimate open-source network. It forms an end-to-end encrypted IPv6 overlay between participating devices and routes traffic across a decentralised mesh. The network has no single central server whose removal would disable the whole system.

Its developers describe Yggdrasil as experimental and do not present it as an anonymity service. Encryption protects traffic across the overlay, while the network's purpose remains general connectivity between participating devices. Public peers can provide an entry point into the mesh. Those traits let legitimate users build distributed links, but they can also be abused as a route to an unrelated command server. Such abuse does not make Yggdrasil malware or show that its operators assisted an attacker.