
Turing test based on real search queries in Yandex
The fact is that all (or almost all) search queries in Yandex , albeit in an anonymous form, are available in real time at export.yandex.ru/last/last20x.xml
Based on this API, I made a small project on Openresty ( nginx + Lua + imagemagick ), which provides a high-performance implementation of CAPTCHA .

It is possible to embed as iframes .
GitHub , demo


Images may contain obscene expressions.
Based on this API, I made a small project on Openresty ( nginx + Lua + imagemagick ), which provides a high-performance implementation of CAPTCHA .

It is possible to embed as iframes .
GitHub , demo


Disclaimer
Images may contain obscene expressions.