[tor-dev] Onion Service - Intropoint DoS Defenses

[Roger Dingledine]

On Thu, May 30, 2019 at 09:03:40PM +0200, juanjo wrote:
> And just came to my mind reading this, that to stop these attacks we could
> implement some authentication based on Proof of Work or something like that.
> This means that to launch such an attack the attacker (client level) should
> compute the PoW and must have many computing power, while normal
> clients/users don't need almost any change. Actually this is what PoW is
> very useful.

Check out https://bugs.torproject.org/25066 for more details on this idea.

There are still some interesting design questions to be resolved before
it's really a proposed idea.

--Roger