Show HN: Replacing CAPTCHAs with adaptive proof-of-work in WordPress
Invisible spam protection for every form, login and checkout. No puzzles, no checkboxes, no lost visitors — a CAPTCHA your users never see.
Summary
A new spam-blocking solution for WordPress using Hashcash, a proof-of-work approach, has been successfully implemented by the founder of a whistle-blowing service. This method complies with EU data privacy laws by being lightweight and cookie-free, effectively blocking 100% of spam bots without impacting legitimate users or incurring ongoing costs.
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