![]() 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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