My understanding is that this new reCAPTCHA is basically just remote attestation. Remote attestation doesn't use blind signatures (as that would be 'farmable') so tying the device to the 'attestee' is technically possible with collusion of Google servers: EK (static burned-in private key) -> AIK (ephemeral identity key in secure enclave signed by a Google server) -> attestation (signed by AIK). As you can see if the…
Stop visiting sites and using services that use reCAPTCHA. Problem solved.
> Ask HN: Did HN just start using Google recaptcha for logins? [0]
> dang
> No recent changes, but we do sometimes turn captchas on for logins when HN is under some kind of (possible) attack or other. That's been happening for a few hours. Hopefully it goes away soon.