Secure Two-Factor Authentication with TREZOR — U2F

Today, SatoshiLabs released the next iteration of the firmware, further expanding the abilities of your TREZOR with a secure and comfortable two-factor authentication. Update your device to enjoy the new features with your favorite online services!

https://blog.trezor.io/secure-two-factor-authentication-with-trezor-u2f-e940fd5a60af#.8w1pmbr9u

More on multi-factor authentication:
https://en.wikipedia.org/wiki/Multi-factor_authentication