From theregister.com
Analyst firm Gartner has advised in favour of the use of CAPTCHAs — but recommends using the least-annoying CAPTCHAs you can find.
The firm’s opinion is contained in a post by senior director analyst Akif Khan, who noted that CAPTCHAs create friction for humans but remain an imperfect defence against bots.
Despite all this, Khan argued in support of them, with exceptions.
“Just don’t use the ‘pick a street sign from this matrix of images’ Google version of a CAPTCHA,” Khan wrote. He advised trying what he called “more evolved” versions out there, like those from Arkose Labs, GeeTest or PerimeterX.