Re:Show HN: Replace CAPTCHA with Proof-of-Work
by vomitcuddle on Wednesday June 25, 2014 @01:23PM
(#7945402)
Effectively, this achieves the complete opposite of what CAPTCHA does. It's a test that only computers can solve.
A much more exciting development in the field of bot/spam detection is verifying the integrity of the user's browser by comparing the exposed functionality (HTML5 and JS) and quirks to the ones expected for its user-agent header. I believe this is the method that Dan Kaminsky's "White Ops" startup uses.
A much more exciting development in the field of bot/spam detection is verifying the integrity of the user's browser by comparing the exposed functionality (HTML5 and JS) and quirks to the ones expected for its user-agent header. I believe this is the method that Dan Kaminsky's "White Ops" startup uses.