Everyone knows what a password is. But we can’t say the same for two-factor authentication or passkeys, which is a shame because these two security features dramatically boost the safety of your online accounts.

Using both is actually your best bet, but when to use one over the other can be confusing. If you don’t know much about 2FA or passkeys or you’re unsure which is better, this guide should clear that right up.

What is 2FA?

Two-factor authentication is a second layer of security you add to an account—think of it like another deadbolt on a door. In order to successfully log in, you must verify yourself a second time.

Traditionally, a password (your first “factor”) is something you know. Your second “factor” is something you have (like a phone or a security key) or something you a

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