MOBILE-OPTIMIZED CAPTCHA SYSTEM BASED ON MULTI-MODAL GESTURE CHALLENGE AND MOBILE ORIENTATION

摘要

In an approach to user authorization by mobile-optimized CAPTCHA, a computing device detects information suggesting a risk level. The computing device displays one or more prompts based on the risk level. The computing device receives a user response in the form of touchless, gesture-based input. The computing device makes a CAPTCHA determination based on the user response.