The camera isn't the part doing that verification. The google service serving that "reCAPTCHA" is what's doing that validation. Unless you're using a custom browser that is reporting a different domain to google than the one requesting the reCAPTCHA, google's service will know which domain is which.
The camera isn't the part doing that verification. The google service serving that "reCAPTCHA" is what's doing that validation. Unless you're using a custom browser that is reporting a different domain to google than the one requesting the reCAPTCHA, google's service will know which domain is which.
How does the verification app on your phone know what's in the URL bar on your desktop?
The QR code/URL would be generated/requested by the javascript running on the website you're viewing, which knows what's in your address bar.
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After you scan the code, the verification app asks you "do you want to verify for example.com?"
If you don't verify for example.com you won't be allowed to view example2.com. So do you want to or not?