reCAPTCHA is a free service to protect your website from spam and abuse. Website users had to confirm that they aren’t robots by reading distorted text and typing it into a box, like this:
Google developed new API that simplifies the reCAPTCHA experience. The new reCAPTCHA API uses an Advanced Risk Analysis (ARA) system, which tracks user behavior before, during, and after they tick the reCAPTCHA box on any given web page. Based on this behavior, it’s apparently easy to tell whether you are a real person or not.
On mobile platforms the system works differently. You’ll still get the tick box to tap, but the secondary text will be a picture puzzle asking you to select all similar images to the one it presents. It’s much easier to tap photos of cats or turkeys than to tediously type a line of distorted text on your phone.
The updated reCAPTCHA is already rolling out on websites across the web. To adopt the new reCAPTCHA for your website, visit here to learn more.