A CAPTCHA Implementation Based on Moving Objects Recognition Problem

Nowadays, malicious computer programs have attempted to attack websites, greatly affecting their availability and security. CAPTCHA (Completely Automated Public Turing test to tell Computers and Human Apart) mechanism is an effectual method in solving this problem. The prevailing implementation of CAPTCHA is 2D still image verification code, however, the developing artificial intelligence and image recognition technologies make it possible for computer programs to pass through CAPTCHA's test. In this paper, we propose a new CAPTCHA implementation, in the form of 3D animation and based on the weak point of computer vision. This new method could prevent attacks based on both image recognition and moving objects recognition in videos. Coupled with easy use for humans, it proves to be a kind of novel, safe and practical CAPTCHA.