Although I think Yubikey is great, I use Plug-Up key to test U2F. http://sk.happlink.com/plugup/en/ http://sk.happlink.com/plugup/en/ It was cheaper but is mor

Although I think Yubikey is great, I use Plug-Up key to test U2F. http://sk.happlink.com/plugup/en/ http://sk.happlink.com/plugup/en/ It was cheaper but is more fragile, worked well to test it out. Now when U2F is getting more support, I think I will buy a Yubikey with U2F.