They already have with the neo-n: https://www.yubico.com/products/yubikey-hardwa...

		cdjk on Oct 21, 2014 \| parent \| context \| favorite \| on: Strengthening 2-Step Verification with Security Ke... They already have with the neo-n: https://www.yubico.com/products/yubikey-hardware/ It does cost a bit more than the U2F-only version, however.