A new DoS protection mechanism for Tor leveraging Proof-of-Work.
Man the comments section on the tor project blog are just as smooth brained as YouTube comments sections.
I kinda expected better of the average reader than commenting “hmm another captcha” 6 hours after they explicitly clarified this isn’t visible to the user (which was also implicit in the whole 30ms time specified).
Like 10 points for reading the article but -30 for reading comprehension.