host key on hardware

[BitMessenger]

Hi,

I'm new to this list. 
For some years I've used CryptoSticks and YubiKeys to authenticate to
SSH on the client side.
Now I wondered if the same also worked on the server side.
The closest I found was this old thread from 2012:
http://www.gossamer-threads.com/lists/openssh/dev/54825
How did this progress further? Is it in the packages in the debian
repositories yet? And is there some documentation on how to set it up?

Rgds
Richard