As awareness grows around many MFA methods being “phishable” (i.e. not phishing resistant), passwordless, FIDO2-based authentication methods (aka. passkeys) like YubiKeys, Okta FastPass, and Windows Hello are being increasingly advocated. This is a good thing. The most commonly used MFA factors (like SMS codes, push notifications, and app-based OTP) are routinely bypassed, with modern reverse-proxy “Attacker-in-the-Middle” phishing kits the most common method (and the standard choice for phishing attacks today). These work by intercepting the authenticated session created when a victim enters their password and completes an MFA check. To do this, the phishing website simply passes messages between the user and the real website — hence “Attacker-in-the-Middle”. In contrast, passkey-based…