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We had an alternative to reCAPTCHA for a moment - proof of work coin miners, when properly set up it is also very privacy-friendly by having the possibility of

We had an alternative to reCAPTCHA for a moment - proof of work coin miners, when properly set up it is also very privacy-friendly by having the possibility of fully self-hosting it. Yes it had it's downsides, but IMHO less downsides than doing work for Google. Same goes for coinminers instead of adsense.

RL_Quine 7y ago
No you didn’t. A few seconds of proof of work is trivial for a bot, any amount that makes it hard for a bot is unusable to a human. This is why nobody uses hashcash.
- Avamander 7y ago
  The same way you can buy captcha solves, it's trivial for a bot.