For the full featured Yubikey I don't particularly mind the price — it does a lot. Pure FIDO U2F keys (USB, but also NFC and Bluetooth LE) however I would very

For the full featured Yubikey I don't particularly mind the price — it does a lot. Pure FIDO U2F keys (USB, but also NFC and Bluetooth LE) however I would very much like to see hitting a $5 or lower price point. It would enable services to introduce proper two factor authentication without breaking the bank. At the moment these keys are just a bit too expensive (Yubico's USB-only U2F key costs $18; slightly cheaper in bulk).