GitHub and, in addition to the UK government. Developed by Google and security company Yubico, U2F today protects several recognizable internet companies – including Facebook, Gmail, and Dropbox. They're inexpensive and available in various connection types and standards, including USB-A, USB-C, Bluetooth, and NFC. Security keys are based on the FIDO U2F Open authentication standard. Once inserted into a computer or mobile device grants the user instant access to services using a button or keypad – and this can offer a higher grade of security without waiting for a code to be beamed to a device.
While these are fine (and better than no 2FA system), physical hardware-based security keys, like the ones featured here, are much better. You've probably seen standard software-based 2FA systems that send you text messages or emails to confirm your identity.
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