Hi All,


I'm need help on key authentication.

How does one know if really the private key comes from the expected host.

How do you "lock-down" a key to only one host/computer? so that if another person get hold of the private key by any chance, they wont be able to connect because the key wasn't created for their PC/host.


I'm new to the keys and signatures authentication. Your help will be greatly appreciated.


Thanks in advance.