Re:Google's Street View computer vision can beat reCAPTCHA w...
by tim333 on Wednesday April 16, 2014 @09:35PM
(#7601576)
Of course the simple way around
"Pick the most unsafe environment", followed by pictures of a house, a park, a volcano, a bed.
if you're a spammer is to choose randomly and make four times as many attempts. Which is why catchpas make you type six or more letters giving millions of combinations so you can't do it randomly. To get up to a similar resistance to random attempts with 'pick the unsafe environment' type questions you'd need of the order or eight of them (giving 4^8 or approx 65k combinations). Would you as a user want to fill in 8 of those things?
"Pick the most unsafe environment", followed by pictures of a house, a park, a volcano, a bed.
if you're a spammer is to choose randomly and make four times as many attempts. Which is why catchpas make you type six or more letters giving millions of combinations so you can't do it randomly. To get up to a similar resistance to random attempts with 'pick the unsafe environment' type questions you'd need of the order or eight of them (giving 4^8 or approx 65k combinations). Would you as a user want to fill in 8 of those things?