What is a CAPTCHA §
- CAPTCHA - Completely Automated Public Turing test to tell Computers and Humans Apart
- In olden days CAPTCHAs were overcome by paying computer sweatshops to solve them (manual human solving of bulk CAPTCHAs)
- But computer vision has come a long way today and CAPTCHAs can be easily solved by hackers today.
Enter reCAPTCHA §
- It is the “I’m not a robot” box
- The trick is not in clicking the box!
- A set of parameters are used to distinguish a human from a bot,
- The mouse movement towards the box
- Clicking order and mouse movement when solving image based tests
- Browsing history (yup!) - the latest reCAPTCHA versions don’t even need us to click the box
Refs §
- https://www.youtube.com/watch?v=4UuvwY6CdLo