Known Hosts

Known hosts is a collection of known host (public) keys.

In the desktop app, known hosts can be found in Preferences > Known Hosts. In the mobile apps, choose Known Hosts from the main menu.

If you are prompted that a known host fingerprint has changed and you didn't reinstall the host or regenerate the host keys, you may have a security issue that needs immediate investigation

Known hosts are synced across all your devices.