http://qezqo7c2mvdk2ml2ys626hlh7ezva75wwwoawcuc7xncp37kedumv2ad.onion/index.php/CAPTCHA
Lillibridge, Martin Abadi , Krishna Bharat , and Andrei Z. Broder ; the second group consisted of Eran Reshef, Gili Raanan and Eilon Solan. [3] This form of CAPTCHA requires that the user type the letters of a distorted image, sometimes with the addition of an obscured sequence of letters or digits that appears on the screen.