The ~/.ssh/known_hosts
file only contains public keys. I mean, maybe someone doesn’t want to hand out the list of hosts that they talk to, but exposing it doesn’t expose the private keys, which are what you really need to keep secret.
Those are in ~/.ssh/id_rsa
or the like, depending upon key type.
I believe it’s ICOM, not Baofeng.
https://www.jpost.com/middle-east/article-820735
On that note, one review on eham.net from twelve years back for this radio is amusing:
https://www.eham.net/reviews/view-product?id=5046