> Google's reCaptcha code seemed to be very keen on knowing my 'cadence' or the way I used my mouse and how quickly (or how slow) I completed the captcha. It also looked at things like timezone, screen resolution, battery charge level etc So they could determine if it was 'you' who was using the captcha, soon after, in a separate session (even on a different device!)
I'd bet a good amount that they store that along with all the other personally identifying info they have on you (and google of course has a massive amount of that); which is basically why after a single reCAPTCHA solve, you wont see them prompt you again for ages - they know who you are.
I'd bet a good amount that they store that along with all the other personally identifying info they have on you (and google of course has a massive amount of that); which is basically why after a single reCAPTCHA solve, you wont see them prompt you again for ages - they know who you are.