[Shoothe]

The blog post you linked to is using the PIV applet on Yubikey. You can do touch based OpenPGP operations on Yubikey too: https://developers.yubico.com/PGP/Card_edit.html#_yubikey_4_...

[Xylakant]

Only for YK4, the old neos and YK3 don’t seem to support that. (Makes me consider buying a YK4 right now)