Changes
→U2F (Universal Second Factor) with Duo 2FA (Yubikey NEO and 4 only)
== U2F (Universal Second Factor) with Duo [[gp:2FA|2FA]] (Yubikey NEO and 4 only) ==
[[w:Universal 2nd Factor|U2F] is a new standard from the FIDO alliance for use in web-browsers; it is based on a challenge-response protocol. The most interesting services currently supporting it are Github, Google, and Virginia Tech.
===Key Preparation===
