Hi @claudio.baldini
The reset button will not delete files in the /home/root folder, so the ssh public keys will remain.
I would recommend disabling password logins in the dropbear configuration file to prevent password resets.
In order to recover, you will have the private keys and have the capability to log into your devices.
What’s even better yet, is if you have the capability to vary the public key on a per device basis, but then you need to keep a database of private keys/public keys.
BR,
Chris