![]() It’s also very nice to use it on Android with NFC.īackup strategy: You can’t make a backup as you don’t have a secret you can backup. You can test U2F on the Yubico demo website. Watch this demo on Youtube to get a feeling for it. During login, you only have to touch the Yubikey. During setup, you pair an online account with a Yubikey device. If you use Firejail sandbox, you need to set browser-disable-u2f no in /etc/firejail/nfig. On Arch Linux, you have to install the libfido2 package. If you use U2F, the browser speaks directly to the Yubikey device, no special drivers or tools are necessary. ![]() U2F solves this problem by using a challenge response mechanism that includes the SSL Channel ID and the browser url of the login page ( docs). The TOTP variant is prone to phishing attacks, as users enter their tokens also on phishing sites. Like TOTP tokens, U2F can be used during web logins for two-factor authentication. Sometimes U2F is also called FIDO2 or WebAuthn. Secure and convient: U2F (Universal 2nd Factor) This prints the 6-digit token every two seconds (needs pip install -user pyotp). There is also the Yubico Authenticator with NFC support for Android. ![]() Yubico Authenticator does not store the secret, it asks the Yubikey device for the token. If you prefer a GUI application, you can use Yubico Authenticator (part of the yubioath-desktop package). You can add 32 of these secrets to a Yubikey device. The secret key is formatted in base32 (e. It gives you a 6 (sometimes 8) digit token you have to enter during login. In general, TOTP (time based one time password) is used for 2FA (two-factor authentication). Time based one time passwords as second factor Serial number: 1312 Firmware version: 5.1.2 YubiKey 5 NFC (5.1.2) Serial: 1312 ykman info
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