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Hashwall – protection against spam and denial of service without a CAPTCHA
- nsajko 5y agoThis is what proof of work should have been used for, invented long before Bitcoin. But it seems to never have caught on. Purelymail uses the system to protect itself from spam: https://purelymail.com https://purelymail.com Wikipedia links: https://en.wikipedia.org/wiki/Proof_of_work https://en.wikipedia.org/wiki/Proof_of_work https://en.wikipedia.org/wiki/Hashcash https://en.wikipedia.org/wiki/Hashcash
- WaxedChewbacca 5y ago