You might have seen USB keys that act as U2F, or Universal Two-Factor, tools to authenticate your online identity. They’re handy little devices that add a second layer of protection to your web-based desktop or laptop activities. They’re also easy to lose.
Why bother carrying a small authentication dongle when you can use something else that you likely already have with you? That’s the question the Fast IDentity Online (FIDO) Alliance and Bluetooth SIG ask and answer with a simple solution: Why not just use your phone?
