I've not looked at the specific implementation here, but Tor's implementation[0] includes a dynamic difficulty scaling. When under attack, legitimate users wil

I've not looked at the specific implementation here, but Tor's implementation[0] includes a dynamic difficulty scaling. When under attack, legitimate users will experience a moderate delay whilst attackers will need to scale their compute. [0]: https://gitlab.torproject.org/tpo/core/torspec/-/blob/main/proposals/327-pow-over-intro.txt https://gitlab.torproject.org/tpo/core/torspec/-/blob/main/p...