MotionCAPTCHA – Stop Spam, Draw Shapes - Joss CrowcroftMotionCAPTCHA is a jQuery CAPTCHA plugin, based on the HTML5 Canvas Harmony procedural drawing tool by Mr Doob and the $1 Unistroke Gesture Regonizer algorithm (and the more recent Protractor algorithm improvement), requiring users to sketch the shape they see in the canvas in order to submit a form. At the moment, it’s just a proof-of-concept – it only uses client-side gesture recognition, and do
