Hacker News new | past | comments | ask | show | jobs | submit login

Some advertisers don't like to trust hits if they can't verify the hit came from a real, live browser. Like the difference between the original recaptcha (read the letters in this image) and the new ones (mouse, keyboard, and browser behaviour looks like a human browsing on a real browser).



Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: