![]() ![]() A correct authentication in part signs that challenge, so timestamping is irrelevant here, your answers are either fresh or they're invalid anyway.īecause a physical FIDO authenticator is independent from the computer you are not necessarily "done for" if the computer is compromised, unless you've outfitted your computer with a finger to press keys it cannot, for example, press the button on the key, so there is no way for the compromised computer to obtain signatures from the authenticator with the UP (User Present) bit set, and checking UP in the signed response is part of WebAuthn. ![]() The Relying Party (a web site you want to authenticate to) sends a random challenge. Go to the MFA section via the Account Security tab. How to set up a security key with your Nord Account Log in to Nord Account and go to Account Settings. If your root is compromised you're also done for.įor WebAuthn (and its predecessor U2F) none of this is correct. These include the Security Key series, Yubikey 5 series, iePass FIDO K44, MultiPass FIDO K25, ePass FIDO NFC K9 and K35, BioPass FIDO K26 and K27, as well as others. ![]() Also, it is probably possible to get the time-stamp within the kernel. ![]() The question is then: does timestamping the response reduce the attack surface enough compared to the downsides? I'd argue yes since the described attack can offset a failed login and the actual attack after a MITM. The verification process takes place at authentication so that would just tell you the current time, something you already know, it's useless. But these OTP strings are generated by the Yubikey, not by Yubico so there's no way for them to be "signed" in this way. answer a security question to provide the required two-factor authentication (2FA). To enable the feature, follow these steps: Access your account. Just have yubikey sign the current time, you're already trusting them to correctly verify the key string.īy "them" you presumably mean Yubico not the Yubikey. Learn about Yubicos YubiKey security token, which provides a second. If you’re accessing your Amazon account from an iPad, you will need to head to the Amazon website in order to turn 2fa on or off. ![]()
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