A YubiKey is a key-sized device that you can plug into your computer’s USB slot to provide another layer of security when accessing your LastPass Account. YubiKeys are a secure, easy to use, two-factor authentication device that are immune from replay-attacks, man-in-the-middle attacks, and a host of other threat vectors.

YubiKey support is a Premium and Enterprise feature, and the device must be purchased through Yubico.com for $25.

Up to 5 YubiKeys can be associated with one LastPass account.