6 ms·The Yubikey is great and has uses outside of U2F, which I've never had much faith in.by ewindisch 9y agoThe Yubikey is great and has uses outside of U2F, which I've never had much faith in.eximius 9y agoU2F is actually a very cool spec, basically a user friendly version of client side certificates (which could be user friendly, but arent). What are your concerns?phyzome 9y ago...this isn't a flaw in U2F.