It forms the basis of the secure tunnel for your data.

You can connect for this session only without saving. Click Cancel: The connection is aborted. How to Update or Change a Host Key

If a server is reinstalled or upgraded, its host key will change. WinSCP will give you a high-priority warning: If you know the change is legitimate: Open the WinSCP Login panel. Select your Site profile. Go to Edit > Advanced . Navigate to SSH > Authentication .

HKEY_CURRENT_USER\Software\Martin Prikryl\WinSCP 2\SshHostKeys