Two-factor authentication has been backstopping our passwords for years, but even those texted codes can leave you exposed to attacks. Plugged into your phone via a USB-C or Lightning port, the Yubikey 5Ci dongle is a physical “key” to augment or even replace conventional password and six-digit passcode combos. Register it with any of the dozens (and growing) of compatible apps and services—including mainstays like Google, Facebook, and Twitter—and go about your digital life quickly and securely.