youpc$ ssh-keygen -t rsa(you can also use puttygen if in windows) 2. upload the key to your device
youpc$ ssh-keygen -t rsa3. open the shell to the device
ssh-keygen -t rsa4. Configure the dropbear on the device
ssh-keygen -t rsa5. Start the dropbear
ssh-keygen -t rsa6. test connection
ssh-keygen -t rsaComplete instruction here.