WebAuthn (also known as FIDO Alliance) is a new standard for authentication that allows users to log in to websites and applications using a security key. If you’re using your Yubikey for TOTP, you can only hold 32 accounts. You also have an unlimited number of accounts for U2F. Can You Use A Yubikey For Multiple Accounts?Ī Yubikey can be used for an unlimited number of accounts if you’re using WebAuthn. It’s small enough to fit on your keychain and looks like a USB thumb drive. Yubikeys can also replace passwords altogether and make for a passwordless login with the WebAuthn standard. Some websites do this with a text or email code, but if you have a Yubikey and the website supports it, you can use a Yubikey instead of a text message or an email. Ideally, you need two keys in case one gets lost, stolen, or damaged in some way.A Yubikey can be a second factor, the thing you enter after your password when logging in.Offers an easy way to secure Windows, Mac, or Linux systems.

Support for Open PGP encryption and code signing.

Scalable (customization tools and custom programming options available for business).

Pretty indistinguishable from USB flash drives so the keys don't attract unwanted attention.Keys are incredibly robust and totally waterproof (one of mine lives on my keyring and gets bashed about a lot, the other I wear around my neck on a chain most of the time).Easy to use (if you can figure out two-factor authentication, you can figure out how to use YubiKeys, and if you get stuck, there are some good instructions available to guide you).Without your username and password, even if it is stolen, it's useless to a third-party.The keys don't require recharging or battery changes.Broad browser support: Chrome, Opera, Firefox, and Edge supports FIDO2/Webauthn.Far less hassle than using text messages or a third-party authenticator app, and speeds up logging into accounts on new devices.Now, rather than outlining how you protect your accounts with YubiKey (the instructions on the Yubico website are detailed and will guide you through the myriad different services you can secure with your YubiKey more efficiently than I can) I'm going to look at the pros and cons of that I've come across over the past months. A chart detailing the available keys along with their specific functionality can be found here.

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