The Yubico YubiKey 5 Nano is eclipsed by most coins and is inconspicuous when attached to a keyring. If you are looking for the smallest security key around, this is it. Continue reading for our pick of the best security key to use. We looked at their user interface, ease of setup, pricing, and design, among other things.

We've compared these keys across numerous factors, from their security protocol and authentication standard to their build quality and portability. While they're undoubtedly dependable, not all security keys are created equal. 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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