Maybe obvious to some, but I got an IMHO excellent idea from a caller today:
The Yubikey with static OTP can be used for generating a gpg passphrase. Creating a good passphrase is not always that easy and the Yubkey can be helpful here.
Combining that with a two-factor authentication can then add some extra security. With a budget approach of using multiple passwords, the static OTP Yubikey can then be used for other applications as well:
viewtopic.php?f=6&t=228Not perfect, but pretty good I think...
Regards,
Jakob E
Hardware- and firmware guy @ Yubico