Using a U2F Yubikey with Linux Mint 19 Tara

YubiKey U2F Security Key

Universal 2nd Factor (U2F) is an open authentication standard that strengthens and simplifies two factor authentication (2FA) using USB or NFC devices. It enables internet users to securely access any number of online services using a single security key with no drivers or client software.

Chrome and Opera are currently the only browsers supporting U2F natively, although with Linux you occasionally need to add some udev  rules. It’s not consistent across Linux distributions. You might find it works out of the box with previous versions of Linux Mint. The version of udev  can change between releases.

To set up your Linux system for YubiKey U2F go to GitHub and download the 70-u2f.rules file. See below for a copy of this file:

Create a copy of the file called 70-u3f.rules  into the Linux directory /etc/udev/rules.d . if the file is already there, ensure that the content looks like the one provided.

Reboot your system to apply the changes.

If your version of udev is lower than 188 (run  sudo udevadm --version from the terminal) use the old rules instead (see below). Ensure you are running Chrome version 38 or later.

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